901216136556 has 96 divisors (see below), whose sum is σ = 2412955023360. Its totient is φ = 290582510400.

The previous prime is 901216136531. The next prime is 901216136567. The reversal of 901216136556 is 655631612109.

901216136556 is a `hidden beast` number, since 9 + 0 + 1 + 2 + 1 + 61 + 36 + 556 = 666.

It is a super-2 number, since 2×901216136556² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7429311 + ... + 7549641.

It is an arithmetic number, because the mean of its divisors is an integer number (25134948160).

Almost surely, 2^901216136556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 901216136556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206477511680).

901216136556 is an abundant number, since it is smaller than the sum of its proper divisors (1511738886804).

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

901216136556 is a wasteful number, since it uses less digits than its factorization.

901216136556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122612 (or 122604 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 901216136556 in words is "nine hundred one billion, two hundred sixteen million, one hundred thirty-six thousand, five hundred fifty-six".