72511156 has 12 divisors (see below), whose sum is σ = 127223460. Its totient is φ = 36161600.

The previous prime is 72511147. The next prime is 72511189. The reversal of 72511156 is 65111527.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 60372900 = 3484^2 + 7770^2 .

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21745 + ... + 24856.

It is an arithmetic number, because the mean of its divisors is an integer number (10601955).

Almost surely, 2^72511156 is an apocalyptic number.

It is an amenable number.

72511156 is a deficient number, since it is larger than the sum of its proper divisors (54712304).

72511156 is a wasteful number, since it uses less digits than its factorization.

72511156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46994 (or 46992 counting only the distinct ones).

The product of its digits is 2100, while the sum is 28.

The square root of 72511156 is about 8515.3482606409. The cubic root of 72511156 is about 416.9989322663.

It can be divided in two parts, 725 and 11156, that added together give a square (11881 = 109²).

The spelling of 72511156 in words is "seventy-two million, five hundred eleven thousand, one hundred fifty-six".