79961873377 has 2 divisors, whose sum is σ = 79961873378. Its totient is φ = 79961873376.

The previous prime is 79961873359. The next prime is 79961873419. The reversal of 79961873377 is 77337816997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79650386176 + 311487201 = 282224^2 + 17649^2 .

It is a cyclic number.

It is not a de Polignac number, because 79961873377 - 2³⁵ = 45602135009 is a prime.

It is not a weakly prime, because it can be changed into another prime (79961873357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39980936688 + 39980936689.

It is an arithmetic number, because the mean of its divisors is an integer number (39980936689).

Almost surely, 2^79961873377 is an apocalyptic number.

It is an amenable number.

79961873377 is a deficient number, since it is larger than the sum of its proper divisors (1).

79961873377 is an equidigital number, since it uses as much as digits as its factorization.

79961873377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84015792, while the sum is 67.

The spelling of 79961873377 in words is "seventy-nine billion, nine hundred sixty-one million, eight hundred seventy-three thousand, three hundred seventy-seven".