1983775657500 has 1500 divisors, whose sum is σ = 8187075234800. Its totient is φ = 418554864000.

The previous prime is 1983775657499. The next prime is 1983775657519. The reversal of 1983775657500 is 57565773891.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1983775657500 is a `hidden beast` number, since 1 + 9 + 8 + 3 + 7 + 7 + 56 + 575 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1500).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 17745 × 6825 × 16380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 499 ways as a sum of consecutive naturals, for example, 152598127494 + ... + 152598127506.

Almost surely, 2^{1983775657500} is an apocalyptic number.

1983775657500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1983775657500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4093537617400).

1983775657500 is an abundant number, since it is smaller than the sum of its proper divisors (6203299577300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1983775657500 is an frugal number, since it uses more digits than its factorization.

1983775657500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 55566000, while the sum is 63.

Multiplying 1983775657500 by its sum of digits (63), we get a square (124977866422500 = 11179350²).

1983775657500 divided by its sum of digits (63) gives a square (31488502500 = 177450²).

The spelling of 1983775657500 in words is "one trillion, nine hundred eighty-three billion, seven hundred seventy-five million, six hundred fifty-seven thousand, five hundred".