79423822081 has 2 divisors, whose sum is σ = 79423822082. Its totient is φ = 79423822080.

The previous prime is 79423822073. The next prime is 79423822117. The reversal of 79423822081 is 18022832497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74518080400 + 4905741681 = 272980^2 + 70041^2 .

It is a cyclic number.

It is not a de Polignac number, because 79423822081 - 2³ = 79423822073 is a prime.

It is a super-2 number, since 2×79423822081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79423822481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39711911040 + 39711911041.

It is an arithmetic number, because the mean of its divisors is an integer number (39711911041).

Almost surely, 2^79423822081 is an apocalyptic number.

It is an amenable number.

79423822081 is a deficient number, since it is larger than the sum of its proper divisors (1).

79423822081 is an equidigital number, since it uses as much as digits as its factorization.

79423822081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 79423822081 in words is "seventy-nine billion, four hundred twenty-three million, eight hundred twenty-two thousand, eighty-one".