770172561 has 12 divisors (see below), whose sum is σ = 1112966400. Its totient is φ = 513219960.

The previous prime is 770172553. The next prime is 770172563. The reversal of 770172561 is 165271077.

It is not a de Polignac number, because 770172561 - 2³ = 770172553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (770172563) 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, 3756 + ... + 39426.

It is an arithmetic number, because the mean of its divisors is an integer number (92747200).

Almost surely, 2^770172561 is an apocalyptic number.

It is an amenable number.

770172561 is a deficient number, since it is larger than the sum of its proper divisors (342793839).

770172561 is a wasteful number, since it uses less digits than its factorization.

770172561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38076 (or 38073 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The square root of 770172561 is about 27751.9830102283. The cubic root of 770172561 is about 916.6341093597.

The spelling of 770172561 in words is "seven hundred seventy million, one hundred seventy-two thousand, five hundred sixty-one".