72858664437 has 32 divisors (see below), whose sum is σ = 109203564288. Its totient is φ = 42872011776.

The previous prime is 72858664429. The next prime is 72858664457. The reversal of 72858664437 is 73446685827.

It is a happy number.

It is not a de Polignac number, because 72858664437 - 2³ = 72858664429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72858664457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2959503 + ... + 2984019.

It is an arithmetic number, because the mean of its divisors is an integer number (3412611384).

Almost surely, 2^72858664437 is an apocalyptic number.

It is an amenable number.

72858664437 is a deficient number, since it is larger than the sum of its proper divisors (36344899851).

72858664437 is a wasteful number, since it uses less digits than its factorization.

72858664437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27869.

The product of its digits is 54190080, while the sum is 60.

The spelling of 72858664437 in words is "seventy-two billion, eight hundred fifty-eight million, six hundred sixty-four thousand, four hundred thirty-seven".