21631563503160 has 128 divisors (see below), whose sum is σ = 70199983687680. Its totient is φ = 5300814924288.

The previous prime is 21631563503159. The next prime is 21631563503177. The reversal of 21631563503160 is 6130536513612.

It is a happy number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 30742674 + ... + 31438433.

It is an arithmetic number, because the mean of its divisors is an integer number (548437372560).

Almost surely, 2^{21631563503160} is an apocalyptic number.

21631563503160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21631563503160 is an abundant number, since it is smaller than the sum of its proper divisors (48568420184520).

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

21631563503160 is a wasteful number, since it uses less digits than its factorization.

21631563503160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62181357 (or 62181353 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 42.

The spelling of 21631563503160 in words is "twenty-one trillion, six hundred thirty-one billion, five hundred sixty-three million, five hundred three thousand, one hundred sixty".