79697136961 has 8 divisors (see below), whose sum is σ = 86792043240. Its totient is φ = 72739996032.

The previous prime is 79697136941. The next prime is 79697136971. The reversal of 79697136961 is 16963179697.

It can be written as a sum of positive squares in 4 ways, for example, as 77792400 + 79619344561 = 8820^2 + 282169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79697136961 - 2¹⁷ = 79697005889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79697136893 and 79697136902.

It is not an unprimeable number, because it can be changed into a prime (79697136931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34440130 + ... + 34442443.

It is an arithmetic number, because the mean of its divisors is an integer number (10849005405).

Almost surely, 2^79697136961 is an apocalyptic number.

It is an amenable number.

79697136961 is a deficient number, since it is larger than the sum of its proper divisors (7094906279).

79697136961 is a wasteful number, since it uses less digits than its factorization.

79697136961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68882675.

The product of its digits is 23147208, while the sum is 64.

The spelling of 79697136961 in words is "seventy-nine billion, six hundred ninety-seven million, one hundred thirty-six thousand, nine hundred sixty-one".