72511753 has 4 divisors (see below), whose sum is σ = 72625168. Its totient is φ = 72398340.

The previous prime is 72511729. The next prime is 72511763. The reversal of 72511753 is 35711527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72511753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72511723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55743 + ... + 57028.

It is an arithmetic number, because the mean of its divisors is an integer number (18156292).

Almost surely, 2^72511753 is an apocalyptic number.

It is an amenable number.

72511753 is a deficient number, since it is larger than the sum of its proper divisors (113415).

72511753 is a wasteful number, since it uses less digits than its factorization.

72511753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113414.

The product of its digits is 7350, while the sum is 31.

The square root of 72511753 is about 8515.3833149189. The cubic root of 72511753 is about 417.0000766773. Note that the first 4 decimals are identical.

The spelling of 72511753 in words is "seventy-two million, five hundred eleven thousand, seven hundred fifty-three".