997724943439056 has 80 divisors (see below), whose sum is σ = 3272960131926400. Its totient is φ = 285064269553152.

The previous prime is 997724943439043. The next prime is 997724943439067. The reversal of 997724943439056 is 650934349427799.

997724943439056 is a `hidden beast` number, since 9 + 9 + 7 + 7 + 2 + 49 + 434 + 3 + 90 + 56 = 666.

997724943439056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×997724943439056² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164967745561 + ... + 164967751608.

It is an arithmetic number, because the mean of its divisors is an integer number (40912001649080).

Almost surely, 2^{997724943439056} is an apocalyptic number.

It is an amenable number.

997724943439056 is an abundant number, since it is smaller than the sum of its proper divisors (2275235188487344).

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

997724943439056 is a wasteful number, since it uses less digits than its factorization.

997724943439056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329935497193 (or 329935497181 counting only the distinct ones).

The product of its (nonzero) digits is 11110659840, while the sum is 81.

The spelling of 997724943439056 in words is "nine hundred ninety-seven trillion, seven hundred twenty-four billion, nine hundred forty-three million, four hundred thirty-nine thousand, fifty-six".