21616061436522 has 96 divisors (see below), whose sum is σ = 53561902178304. Its totient is φ = 6171817226400.

The previous prime is 21616061436511. The next prime is 21616061436547. The reversal of 21616061436522 is 22563416061612.

21616061436522 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 6 + 0 + 614 + 3 + 6 + 5 + 22 = 666.

It is a super-2 number, since 2×21616061436522² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1404453447 + ... + 1404468837.

It is an arithmetic number, because the mean of its divisors is an integer number (557936481024).

Almost surely, 2^{21616061436522} is an apocalyptic number.

21616061436522 is an abundant number, since it is smaller than the sum of its proper divisors (31945840741782).

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

21616061436522 is a wasteful number, since it uses less digits than its factorization.

21616061436522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22264 (or 22261 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 21616061436522 in words is "twenty-one trillion, six hundred sixteen billion, sixty-one million, four hundred thirty-six thousand, five hundred twenty-two".