79178141957 has 2 divisors, whose sum is σ = 79178141958. Its totient is φ = 79178141956.

The previous prime is 79178141929. The next prime is 79178141963. The reversal of 79178141957 is 75914187197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43411389316 + 35766752641 = 208354^2 + 189121^2 .

It is a cyclic number.

It is not a de Polignac number, because 79178141957 - 2²⁶ = 79111033093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79178141896 and 79178141905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79178141927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39589070978 + 39589070979.

It is an arithmetic number, because the mean of its divisors is an integer number (39589070979).

Almost surely, 2^79178141957 is an apocalyptic number.

It is an amenable number.

79178141957 is a deficient number, since it is larger than the sum of its proper divisors (1).

79178141957 is an equidigital number, since it uses as much as digits as its factorization.

79178141957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 59.

The spelling of 79178141957 in words is "seventy-nine billion, one hundred seventy-eight million, one hundred forty-one thousand, nine hundred fifty-seven".