72326540624 has 40 divisors (see below), whose sum is σ = 151805153640. Its totient is φ = 33381464064.

The previous prime is 72326540609. The next prime is 72326540677. The reversal of 72326540624 is 42604562327.

It can be written as a sum of positive squares in 4 ways, for example, as 39577123600 + 32749417024 = 198940^2 + 180968^2 .

It is a super-2 number, since 2×72326540624² (a number of 23 digits) contains 22 as substring.

It is a congruent 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, 993617 + ... + 1063920.

It is an arithmetic number, because the mean of its divisors is an integer number (3795128841).

Almost surely, 2^72326540624 is an apocalyptic number.

It is an amenable number.

72326540624 is an abundant number, since it is smaller than the sum of its proper divisors (79478613016).

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

72326540624 is a wasteful number, since it uses less digits than its factorization.

72326540624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057584 (or 2057552 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 41.

The spelling of 72326540624 in words is "seventy-two billion, three hundred twenty-six million, five hundred forty thousand, six hundred twenty-four".