21616025636612 has 36 divisors (see below), whose sum is σ = 41599980549120. Its totient is φ = 9820646982960.

The previous prime is 21616025636609. The next prime is 21616025636627. The reversal of 21616025636612 is 21663652061612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9964868 + ... + 11938619.

Almost surely, 2^{21616025636612} is an apocalyptic number.

21616025636612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21616025636612 is a deficient number, since it is larger than the sum of its proper divisors (19983954912508).

21616025636612 is a wasteful number, since it uses less digits than its factorization.

21616025636612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21905552 (or 21905539 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 21616025636612 in words is "twenty-one trillion, six hundred sixteen billion, twenty-five million, six hundred thirty-six thousand, six hundred twelve".