79765551 has 12 divisors (see below), whose sum is σ = 115366680. Its totient is φ = 53107920.

The previous prime is 79765529. The next prime is 79765571. The reversal of 79765551 is 15556797.

It is a happy number.

79765551 is a `hidden beast` number, since 7 + 97 + 6 + 5 + 551 = 666.

It is not a de Polignac number, because 79765551 - 2⁵ = 79765519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79765497 and 79765506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79765501) 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, 2116 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (9613890).

Almost surely, 2^79765551 is an apocalyptic number.

79765551 is a deficient number, since it is larger than the sum of its proper divisors (35601129).

79765551 is a wasteful number, since it uses less digits than its factorization.

79765551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11526 (or 11523 counting only the distinct ones).

The product of its digits is 330750, while the sum is 45.

The square root of 79765551 is about 8931.1561961484. The cubic root of 79765551 is about 430.4656052681.

The spelling of 79765551 in words is "seventy-nine million, seven hundred sixty-five thousand, five hundred fifty-one".