83572720836 has 24 divisors (see below), whose sum is σ = 212730562464. Its totient is φ = 25325066880.

The previous prime is 83572720813. The next prime is 83572720841. The reversal of 83572720836 is 63802727538.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316563205 + ... + 316563468.

It is an arithmetic number, because the mean of its divisors is an integer number (8863773436).

Almost surely, 2^83572720836 is an apocalyptic number.

It is an amenable number.

83572720836 is an abundant number, since it is smaller than the sum of its proper divisors (129157841628).

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

83572720836 is a wasteful number, since it uses less digits than its factorization.

83572720836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633126691 (or 633126689 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

It can be divided in two parts, 83572 and 720836, that added together give a palindrome (804408).

The spelling of 83572720836 in words is "eighty-three billion, five hundred seventy-two million, seven hundred twenty thousand, eight hundred thirty-six".