55783790233920 has 3360 divisors, whose sum is σ = 250797182017536. Its totient is φ = 11514103603200.

The previous prime is 55783790233883. The next prime is 55783790233937. The reversal of 55783790233920 is 2933209738755.

It is a happy number.

55783790233920 is a `hidden beast` number, since 5 + 5 + 7 + 8 + 379 + 0 + 233 + 9 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (3360).

It is a super-2 number, since 2×55783790233920² (a number of 28 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 168531088155 + ... + 168531088485.

Almost surely, 2^{55783790233920} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55783790233920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125398591008768).

55783790233920 is an abundant number, since it is smaller than the sum of its proper divisors (195013391783616).

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

55783790233920 is a wasteful number, since it uses less digits than its factorization.

55783790233920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 85730400, while the sum is 63.

The spelling of 55783790233920 in words is "fifty-five trillion, seven hundred eighty-three billion, seven hundred ninety million, two hundred thirty-three thousand, nine hundred twenty".