79202941681 has 2 divisors, whose sum is σ = 79202941682. Its totient is φ = 79202941680.

The previous prime is 79202941621. The next prime is 79202941687. The reversal of 79202941681 is 18614920297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74867904400 + 4335037281 = 273620^2 + 65841^2 .

It is a cyclic number.

It is not a de Polignac number, because 79202941681 - 2¹⁵ = 79202908913 is a prime.

It is a super-2 number, since 2×79202941681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79202941687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39601470840 + 39601470841.

It is an arithmetic number, because the mean of its divisors is an integer number (39601470841).

Almost surely, 2^79202941681 is an apocalyptic number.

It is an amenable number.

79202941681 is a deficient number, since it is larger than the sum of its proper divisors (1).

79202941681 is an equidigital number, since it uses as much as digits as its factorization.

79202941681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 79202941681 in words is "seventy-nine billion, two hundred two million, nine hundred forty-one thousand, six hundred eighty-one".