79748640220 has 24 divisors (see below), whose sum is σ = 171366847344. Its totient is φ = 31157607936.

The previous prime is 79748640217. The next prime is 79748640221. The reversal of 79748640220 is 2204684797.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79748640221) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 46364629 + ... + 46366348.

It is an arithmetic number, because the mean of its divisors is an integer number (7140285306).

Almost surely, 2^79748640220 is an apocalyptic number.

It is an amenable number.

79748640220 is an abundant number, since it is smaller than the sum of its proper divisors (91618207124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79748640220 is a wasteful number, since it uses less digits than its factorization.

79748640220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92731029 (or 92731027 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 79748640220 in words is "seventy-nine billion, seven hundred forty-eight million, six hundred forty thousand, two hundred twenty".