79961764313 has 2 divisors, whose sum is σ = 79961764314. Its totient is φ = 79961764312.

The previous prime is 79961764301. The next prime is 79961764321. The reversal of 79961764313 is 31346716997.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51748515289 + 28213249024 = 227483^2 + 167968^2 .

It is a cyclic number.

It is not a de Polignac number, because 79961764313 - 2⁴ = 79961764297 is a prime.

It is not a weakly prime, because it can be changed into another prime (79961794313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39980882156 + 39980882157.

It is an arithmetic number, because the mean of its divisors is an integer number (39980882157).

Almost surely, 2^79961764313 is an apocalyptic number.

It is an amenable number.

79961764313 is a deficient number, since it is larger than the sum of its proper divisors (1).

79961764313 is an equidigital number, since it uses as much as digits as its factorization.

79961764313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 56.

The spelling of 79961764313 in words is "seventy-nine billion, nine hundred sixty-one million, seven hundred sixty-four thousand, three hundred thirteen".