765472561 has 12 divisors (see below), whose sum is σ = 897466368. Its totient is φ = 650947752.

The previous prime is 765472537. The next prime is 765472571. The reversal of 765472561 is 165274567.

It is not a de Polignac number, because 765472561 - 2¹¹ = 765470513 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (765472511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55281 + ... + 67726.

It is an arithmetic number, because the mean of its divisors is an integer number (74788864).

Almost surely, 2^765472561 is an apocalyptic number.

It is an amenable number.

765472561 is a deficient number, since it is larger than the sum of its proper divisors (131993807).

765472561 is a wasteful number, since it uses less digits than its factorization.

765472561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123148 (or 123141 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 765472561 is about 27667.1747925226. The cubic root of 765472561 is about 914.7657082754.

The spelling of 765472561 in words is "seven hundred sixty-five million, four hundred seventy-two thousand, five hundred sixty-one".