31951728073056 has 96 divisors (see below), whose sum is σ = 91499461740288. Its totient is φ = 9682200957440.

The previous prime is 31951728073007. The next prime is 31951728073121. The reversal of 31951728073056 is 65037082715913.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 31951728072987 and 31951728073005.

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, 89817970 + ... + 90173006.

It is an arithmetic number, because the mean of its divisors is an integer number (953119393128).

Almost surely, 2^{31951728073056} is an apocalyptic number.

It is an amenable number.

31951728073056 is an abundant number, since it is smaller than the sum of its proper divisors (59547733667232).

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

31951728073056 is a wasteful number, since it uses less digits than its factorization.

31951728073056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440284 (or 440276 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 31951728073056 in words is "thirty-one trillion, nine hundred fifty-one billion, seven hundred twenty-eight million, seventy-three thousand, fifty-six".