21161014546656 has 96 divisors (see below), whose sum is σ = 60249689383968. Its totient is φ = 6476828917760.

The previous prime is 21161014546561. The next prime is 21161014546669. The reversal of 21161014546656 is 65664541016112.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 158058795 + ... + 158192618.

It is an arithmetic number, because the mean of its divisors is an integer number (627600931083).

Almost surely, 2^{21161014546656} is an apocalyptic number.

It is an amenable number.

21161014546656 is an abundant number, since it is smaller than the sum of its proper divisors (39088674837312).

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

21161014546656 is a wasteful number, since it uses less digits than its factorization.

21161014546656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316251484 (or 316251476 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 21161014546656 in words is "twenty-one trillion, one hundred sixty-one billion, fourteen million, five hundred forty-six thousand, six hundred fifty-six".