921553867795392 has 672 divisors, whose sum is σ = 2942148707796480. Its totient is φ = 273873496965120.

The previous prime is 921553867795369. The next prime is 921553867795397. The reversal of 921553867795392 is 293597768355129.

921553867795392 is a `hidden beast` number, since 9 + 2 + 1 + 5 + 5 + 3 + 8 + 6 + 7 + 79 + 539 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921553867795397) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 454191161034 + ... + 454191163062.

It is an arithmetic number, because the mean of its divisors is an integer number (4378197481840).

Almost surely, 2^{921553867795392} 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 921553867795392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471074353898240).

921553867795392 is an abundant number, since it is smaller than the sum of its proper divisors (2020594840001088).

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

921553867795392 is a wasteful number, since it uses less digits than its factorization.

921553867795392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941 (or 4928 counting only the distinct ones).

The product of its digits is 7715736000, while the sum is 81.

The spelling of 921553867795392 in words is "nine hundred twenty-one trillion, five hundred fifty-three billion, eight hundred sixty-seven million, seven hundred ninety-five thousand, three hundred ninety-two".