120016621656 has 48 divisors (see below), whose sum is σ = 325364200200. Its totient is φ = 39966256512.

The previous prime is 120016621651. The next prime is 120016621691. The reversal of 120016621656 is 656126610021.

120016621656 is a `hidden beast` number, since 1 + 20 + 0 + 1 + 6 + 621 + 6 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 120016621656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120016621651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 744541 + ... + 891276.

Almost surely, 2^120016621656 is an apocalyptic number.

It is an amenable number.

120016621656 is an abundant number, since it is smaller than the sum of its proper divisors (205347578544).

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

120016621656 is a wasteful number, since it uses less digits than its factorization.

120016621656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636848 (or 1636841 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 120016621656 in words is "one hundred twenty billion, sixteen million, six hundred twenty-one thousand, six hundred fifty-six".