72613545 has 16 divisors (see below), whose sum is σ = 123016320. Its totient is φ = 36449024.

The previous prime is 72613537. The next prime is 72613549. The reversal of 72613545 is 54531627.

It is a cyclic number.

It is not a de Polignac number, because 72613545 - 2³ = 72613537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72613549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142125 + ... + 142634.

It is an arithmetic number, because the mean of its divisors is an integer number (7688520).

Almost surely, 2^72613545 is an apocalyptic number.

It is an amenable number.

72613545 is a deficient number, since it is larger than the sum of its proper divisors (50402775).

72613545 is a wasteful number, since it uses less digits than its factorization.

72613545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284784.

The product of its digits is 25200, while the sum is 33.

The square root of 72613545 is about 8521.3581663958. The cubic root of 72613545 is about 417.1951136795.

The spelling of 72613545 in words is "seventy-two million, six hundred thirteen thousand, five hundred forty-five".