21616061436524 has 12 divisors (see below), whose sum is σ = 39048369046848. Its totient is φ = 10459384566000.

The previous prime is 21616061436511. The next prime is 21616061436547. The reversal of 21616061436524 is 42563416061612.

It is a super-2 number, since 2×21616061436524² (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 3 ways as a sum of consecutive naturals, for example, 87161537927 + ... + 87161538174.

It is an arithmetic number, because the mean of its divisors is an integer number (3254030753904).

Almost surely, 2^{21616061436524} is an apocalyptic number.

It is an amenable number.

21616061436524 is a deficient number, since it is larger than the sum of its proper divisors (17432307610324).

21616061436524 is a wasteful number, since it uses less digits than its factorization.

21616061436524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174323076136 (or 174323076134 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 21616061436524 in words is "twenty-one trillion, six hundred sixteen billion, sixty-one million, four hundred thirty-six thousand, five hundred twenty-four".