72637545 has 16 divisors (see below), whose sum is σ = 116326080. Its totient is φ = 38704704.

The previous prime is 72637531. The next prime is 72637561. The reversal of 72637545 is 54573627.

It is not a de Polignac number, because 72637545 - 2²⁵ = 39083113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29211 + ... + 31599.

It is an arithmetic number, because the mean of its divisors is an integer number (7270380).

Almost surely, 2^72637545 is an apocalyptic number.

It is an amenable number.

72637545 is a deficient number, since it is larger than the sum of its proper divisors (43688535).

72637545 is a wasteful number, since it uses less digits than its factorization.

72637545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424.

The product of its digits is 176400, while the sum is 39.

The square root of 72637545 is about 8522.7662762744. The cubic root of 72637545 is about 417.2410719545.

The spelling of 72637545 in words is "seventy-two million, six hundred thirty-seven thousand, five hundred forty-five".