72542563144 has 16 divisors (see below), whose sum is σ = 137055607920. Its totient is φ = 35994401040.

The previous prime is 72542563129. The next prime is 72542563199. The reversal of 72542563144 is 44136524527.

It is a self number, because there is not a number n which added to its sum of digits gives 72542563144.

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, 34608954 + ... + 34611049.

It is an arithmetic number, because the mean of its divisors is an integer number (8565975495).

Almost surely, 2^72542563144 is an apocalyptic number.

It is an amenable number.

72542563144 is a deficient number, since it is larger than the sum of its proper divisors (64513044776).

72542563144 is a wasteful number, since it uses less digits than its factorization.

72542563144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69220140 (or 69220136 counting only the distinct ones).

The product of its digits is 806400, while the sum is 43.

The spelling of 72542563144 in words is "seventy-two billion, five hundred forty-two million, five hundred sixty-three thousand, one hundred forty-four".