82501953021 has 12 divisors (see below), whose sum is σ = 119609231040. Its totient is φ = 54798343560.

The previous prime is 82501952989. The next prime is 82501953047. The reversal of 82501953021 is 12035910528.

82501953021 is a `hidden beast` number, since 82 + 501 + 9 + 53 + 0 + 21 = 666.

It is not a de Polignac number, because 82501953021 - 2⁵ = 82501952989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82501953221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16910631 + ... + 16915508.

It is an arithmetic number, because the mean of its divisors is an integer number (9967435920).

Almost surely, 2^82501953021 is an apocalyptic number.

It is an amenable number.

82501953021 is a deficient number, since it is larger than the sum of its proper divisors (37107278019).

82501953021 is a wasteful number, since it uses less digits than its factorization.

82501953021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33826416 (or 33826413 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 82501953021 in words is "eighty-two billion, five hundred one million, nine hundred fifty-three thousand, twenty-one".