79561761 has 16 divisors (see below), whose sum is σ = 114514560. Its totient is φ = 48984320.

The previous prime is 79561753. The next prime is 79561787. The reversal of 79561761 is 16716597.

It is a cyclic number.

It is not a de Polignac number, because 79561761 - 2³ = 79561753 is a prime.

It is a super-2 number, since 2×79561761² = 12660147626842242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79561711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17880 + ... + 21881.

It is an arithmetic number, because the mean of its divisors is an integer number (7157160).

Almost surely, 2^79561761 is an apocalyptic number.

It is an amenable number.

79561761 is a deficient number, since it is larger than the sum of its proper divisors (34952799).

79561761 is a wasteful number, since it uses less digits than its factorization.

79561761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39816.

The product of its digits is 79380, while the sum is 42.

The square root of 79561761 is about 8919.7399625774. The cubic root of 79561761 is about 430.0986991752.

The spelling of 79561761 in words is "seventy-nine million, five hundred sixty-one thousand, seven hundred sixty-one".