79890679017601 has 2 divisors, whose sum is σ = 79890679017602. Its totient is φ = 79890679017600.

The previous prime is 79890679017577. The next prime is 79890679017637. The reversal of 79890679017601 is 10671097609897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56241900291600 + 23648778726001 = 7499460^2 + 4863001^2 .

It is an emirp because it is prime and its reverse (10671097609897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79890679017601 - 2³⁹ = 79340923203713 is a prime.

It is not a weakly prime, because it can be changed into another prime (79890659017601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39945339508800 + 39945339508801.

It is an arithmetic number, because the mean of its divisors is an integer number (39945339508801).

Almost surely, 2^{79890679017601} is an apocalyptic number.

It is an amenable number.

79890679017601 is a deficient number, since it is larger than the sum of its proper divisors (1).

79890679017601 is an equidigital number, since it uses as much as digits as its factorization.

79890679017601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72013536, while the sum is 70.

The spelling of 79890679017601 in words is "seventy-nine trillion, eight hundred ninety billion, six hundred seventy-nine million, seventeen thousand, six hundred one".