72517569 has 8 divisors (see below), whose sum is σ = 98747520. Its totient is φ = 47316336.

The previous prime is 72517567. The next prime is 72517573. The reversal of 72517569 is 96571527.

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

It is not a de Polignac number, because 72517569 - 2¹ = 72517567 is a prime.

It is a super-2 number, since 2×72517569² = 10517595627339522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72517569.

It is not an unprimeable number, because it can be changed into a prime (72517567) 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, 257014 + ... + 257295.

It is an arithmetic number, because the mean of its divisors is an integer number (12343440).

Almost surely, 2^72517569 is an apocalyptic number.

It is an amenable number.

72517569 is a deficient number, since it is larger than the sum of its proper divisors (26229951).

72517569 is a wasteful number, since it uses less digits than its factorization.

72517569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514359.

The product of its digits is 132300, while the sum is 42.

The square root of 72517569 is about 8515.7248076720. The cubic root of 72517569 is about 417.0112252498.

The spelling of 72517569 in words is "seventy-two million, five hundred seventeen thousand, five hundred sixty-nine".