216031311615856 has 40 divisors (see below), whose sum is σ = 456612702135408. Its totient is φ = 98195821440000.

The previous prime is 216031311615841. The next prime is 216031311615893. The reversal of 216031311615856 is 658516113130612.

It is a super-2 number, since 2×216031311615856² (a number of 29 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 7 ways as a sum of consecutive naturals, for example, 91067206 + ... + 93409306.

Almost surely, 2^{216031311615856} is an apocalyptic number.

It is an amenable number.

216031311615856 is an abundant number, since it is smaller than the sum of its proper divisors (240581390519552).

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

216031311615856 is a wasteful number, since it uses less digits than its factorization.

216031311615856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866201 (or 2866195 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 216031311615856 in words is "two hundred sixteen trillion, thirty-one billion, three hundred eleven million, six hundred fifteen thousand, eight hundred fifty-six".