79939220744 has 8 divisors (see below), whose sum is σ = 149886038910. Its totient is φ = 39969610368.

The previous prime is 79939220681. The next prime is 79939220761. The reversal of 79939220744 is 44702293997.

It can be written as a sum of positive squares in only one way, i.e., 51297720100 + 28641500644 = 226490^2 + 169238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 79939220744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996201289 + ... + 4996201304.

Almost surely, 2^79939220744 is an apocalyptic number.

It is an amenable number.

79939220744 is a deficient number, since it is larger than the sum of its proper divisors (69946818166).

79939220744 is a wasteful number, since it uses less digits than its factorization.

79939220744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9992402599 (or 9992402595 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 79939220744 in words is "seventy-nine billion, nine hundred thirty-nine million, two hundred twenty thousand, seven hundred forty-four".