72323657015 has 4 divisors (see below), whose sum is σ = 86788388424. Its totient is φ = 57858925608.

The previous prime is 72323657009. The next prime is 72323657051. The reversal of 72323657015 is 51075632327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72323657015 - 2²² = 72319462711 is a prime.

It is a super-2 number, since 2×72323657015² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7232365697 + ... + 7232365706.

It is an arithmetic number, because the mean of its divisors is an integer number (21697097106).

Almost surely, 2^72323657015 is an apocalyptic number.

72323657015 is a deficient number, since it is larger than the sum of its proper divisors (14464731409).

72323657015 is a wasteful number, since it uses less digits than its factorization.

72323657015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14464731408.

The product of its (nonzero) digits is 264600, while the sum is 41.

The spelling of 72323657015 in words is "seventy-two billion, three hundred twenty-three million, six hundred fifty-seven thousand, fifteen".