72491577 has 8 divisors (see below), whose sum is σ = 96898080. Its totient is φ = 48206400.

The previous prime is 72491563. The next prime is 72491581. The reversal of 72491577 is 77519427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72491577 - 2⁶ = 72491513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72491557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28927 + ... + 31332.

It is an arithmetic number, because the mean of its divisors is an integer number (12112260).

Almost surely, 2^72491577 is an apocalyptic number.

It is an amenable number.

72491577 is a deficient number, since it is larger than the sum of its proper divisors (24406503).

72491577 is a wasteful number, since it uses less digits than its factorization.

72491577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60663.

The product of its digits is 123480, while the sum is 42.

The square root of 72491577 is about 8514.1985530054. The cubic root of 72491577 is about 416.9613970902.

The spelling of 72491577 in words is "seventy-two million, four hundred ninety-one thousand, five hundred seventy-seven".