72528577 has 4 divisors (see below), whose sum is σ = 79122096. Its totient is φ = 65935060.

The previous prime is 72528571. The next prime is 72528607. The reversal of 72528577 is 77582527.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77582527 = 11 ⋅7052957.

It is a cyclic number.

It is not a de Polignac number, because 72528577 - 2³ = 72528569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72528571) 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 in 3 ways as a sum of consecutive naturals, for example, 3296743 + ... + 3296764.

It is an arithmetic number, because the mean of its divisors is an integer number (19780524).

Almost surely, 2^72528577 is an apocalyptic number.

It is an amenable number.

72528577 is a deficient number, since it is larger than the sum of its proper divisors (6593519).

72528577 is a wasteful number, since it uses less digits than its factorization.

72528577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593518.

The product of its digits is 274400, while the sum is 43.

The square root of 72528577 is about 8516.3711168549. The cubic root of 72528577 is about 417.0323246301.

The spelling of 72528577 in words is "seventy-two million, five hundred twenty-eight thousand, five hundred seventy-seven".