16621045156056 has 64 divisors (see below), whose sum is σ = 45332513550720. Its totient is φ = 5036414750720.

The previous prime is 16621045156049. The next prime is 16621045156073. The reversal of 16621045156056 is 65065154012661.

It is a junction number, because it is equal to n+sod(n) for n = 16621045155996 and 16621045156014.

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, 3384811 + ... + 6685733.

It is an arithmetic number, because the mean of its divisors is an integer number (708320524230).

Almost surely, 2^{16621045156056} is an apocalyptic number.

It is an amenable number.

16621045156056 is an abundant number, since it is smaller than the sum of its proper divisors (28711468394664).

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

16621045156056 is a wasteful number, since it uses less digits than its factorization.

16621045156056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320016 (or 3320012 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 16621045156056 in words is "sixteen trillion, six hundred twenty-one billion, forty-five million, one hundred fifty-six thousand, fifty-six".