79617905136261 has 64 divisors (see below), whose sum is σ = 121464095462400. Its totient is φ = 51506077824000.

The previous prime is 79617905136229. The next prime is 79617905136277. The reversal of 79617905136261 is 16263150971697.

It is a happy number.

79617905136261 is a `hidden beast` number, since 7 + 9 + 6 + 1 + 7 + 90 + 513 + 6 + 26 + 1 = 666.

It is not a de Polignac number, because 79617905136261 - 2⁵ = 79617905136229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79617905136221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2800573395 + ... + 2800601823.

It is an arithmetic number, because the mean of its divisors is an integer number (1897876491600).

Almost surely, 2^{79617905136261} is an apocalyptic number.

It is an amenable number.

79617905136261 is a deficient number, since it is larger than the sum of its proper divisors (41846190326139).

79617905136261 is a wasteful number, since it uses less digits than its factorization.

79617905136261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35867 (or 35861 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 63.

The spelling of 79617905136261 in words is "seventy-nine trillion, six hundred seventeen billion, nine hundred five million, one hundred thirty-six thousand, two hundred sixty-one".