72555569 has 8 divisors (see below), whose sum is σ = 74647872. Its totient is φ = 70490160.

The previous prime is 72555563. The next prime is 72555589. The reversal of 72555569 is 96555527.

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

It is a cyclic number.

It is not a de Polignac number, because 72555569 - 2⁸ = 72555313 is a prime.

It is a super-2 number, since 2×72555569² = 10528621185827522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72555563) 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 7 ways as a sum of consecutive naturals, for example, 1187 + ... + 12104.

It is an arithmetic number, because the mean of its divisors is an integer number (9330984).

Almost surely, 2^72555569 is an apocalyptic number.

It is an amenable number.

72555569 is a deficient number, since it is larger than the sum of its proper divisors (2092303).

72555569 is a wasteful number, since it uses less digits than its factorization.

72555569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13447.

The product of its digits is 472500, while the sum is 44.

The square root of 72555569 is about 8517.9556819697. The cubic root of 72555569 is about 417.0840520129.

The spelling of 72555569 in words is "seventy-two million, five hundred fifty-five thousand, five hundred sixty-nine".