79408611771157 has 2 divisors, whose sum is σ = 79408611771158. Its totient is φ = 79408611771156.

The previous prime is 79408611771077. The next prime is 79408611771257. The reversal of 79408611771157 is 75117711680497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70350642725841 + 9057969045316 = 8387529^2 + 3009646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79408611771157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79408611771257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39704305885578 + 39704305885579.

It is an arithmetic number, because the mean of its divisors is an integer number (39704305885579).

Almost surely, 2^{79408611771157} is an apocalyptic number.

It is an amenable number.

79408611771157 is a deficient number, since it is larger than the sum of its proper divisors (1).

79408611771157 is an equidigital number, since it uses as much as digits as its factorization.

79408611771157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20744640, while the sum is 64.

The spelling of 79408611771157 in words is "seventy-nine trillion, four hundred eight billion, six hundred eleven million, seven hundred seventy-one thousand, one hundred fifty-seven".