21162650642528 has 24 divisors (see below), whose sum is σ = 41666966520480. Its totient is φ = 10580563907200.

The previous prime is 21162650642527. The next prime is 21162650642603. The reversal of 21162650642528 is 82524605626112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162650642527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23342408 + ... + 24232071.

It is an arithmetic number, because the mean of its divisors is an integer number (1736123605020).

Almost surely, 2^{21162650642528} is an apocalyptic number.

It is an amenable number.

21162650642528 is a deficient number, since it is larger than the sum of its proper divisors (20504315877952).

21162650642528 is a wasteful number, since it uses less digits than its factorization.

21162650642528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47588390 (or 47588382 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 21162650642528 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty million, six hundred forty-two thousand, five hundred twenty-eight".