72511672 has 8 divisors (see below), whose sum is σ = 135959400. Its totient is φ = 36255832.

The previous prime is 72511667. The next prime is 72511679. The reversal of 72511672 is 27611527.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4531972 + ... + 4531987.

It is an arithmetic number, because the mean of its divisors is an integer number (16994925).

Almost surely, 2^72511672 is an apocalyptic number.

It is an amenable number.

72511672 is a deficient number, since it is larger than the sum of its proper divisors (63447728).

72511672 is a wasteful number, since it uses less digits than its factorization.

72511672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9063965 (or 9063961 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 72511672 is about 8515.3785588193. The cubic root of 72511672 is about 416.9999214058. Note that the first 4 decimals are identical.

The spelling of 72511672 in words is "seventy-two million, five hundred eleven thousand, six hundred seventy-two".