79218946073 has 2 divisors, whose sum is σ = 79218946074. Its totient is φ = 79218946072.

The previous prime is 79218946061. The next prime is 79218946087. The reversal of 79218946073 is 37064981297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76952424409 + 2266521664 = 277403^2 + 47608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79218946073 is a prime.

It is not a weakly prime, because it can be changed into another prime (79218946003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39609473036 + 39609473037.

It is an arithmetic number, because the mean of its divisors is an integer number (39609473037).

Almost surely, 2^79218946073 is an apocalyptic number.

It is an amenable number.

79218946073 is a deficient number, since it is larger than the sum of its proper divisors (1).

79218946073 is an equidigital number, since it uses as much as digits as its factorization.

79218946073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 79218946073 in words is "seventy-nine billion, two hundred eighteen million, nine hundred forty-six thousand, seventy-three".