72504583217 has 4 divisors (see below), whose sum is σ = 79095908976. Its totient is φ = 65913257460.

The previous prime is 72504583199. The next prime is 72504583241. The reversal of 72504583217 is 71238540527.

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 not a de Polignac number, because 72504583217 - 2⁶ = 72504583153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72504583717) 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, 3295662863 + ... + 3295662884.

It is an arithmetic number, because the mean of its divisors is an integer number (19773977244).

Almost surely, 2^72504583217 is an apocalyptic number.

It is an amenable number.

72504583217 is a deficient number, since it is larger than the sum of its proper divisors (6591325759).

72504583217 is a wasteful number, since it uses less digits than its factorization.

72504583217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6591325758.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 72504583217 in words is "seventy-two billion, five hundred four million, five hundred eighty-three thousand, two hundred seventeen".