1918280451996 has 240 divisors, whose sum is σ = 5353911474912. Its totient is φ = 596823552000.

The previous prime is 1918280451991. The next prime is 1918280452019. The reversal of 1918280451996 is 6991540828191.

1918280451996 is a `hidden beast` number, since 1 + 9 + 1 + 8 + 28 + 0 + 4 + 519 + 96 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918280451991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 519716511 + ... + 519720201.

Almost surely, 2^{1918280451996} 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 1918280451996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2676955737456).

1918280451996 is an abundant number, since it is smaller than the sum of its proper divisors (3435631022916).

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

1918280451996 is a wasteful number, since it uses less digits than its factorization.

1918280451996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482 (or 4471 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The spelling of 1918280451996 in words is "one trillion, nine hundred eighteen billion, two hundred eighty million, four hundred fifty-one thousand, nine hundred ninety-six".