79388678454220 has 24 divisors (see below), whose sum is σ = 168245731407600. Its totient is φ = 31464136780992.

The previous prime is 79388678454167. The next prime is 79388678454247. The reversal of 79388678454220 is 2245487688397.

It is a super-3 number, since 3×79388678454220³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18208410310 + ... + 18208414669.

It is an arithmetic number, because the mean of its divisors is an integer number (7010238808650).

Almost surely, 2^{79388678454220} is an apocalyptic number.

It is an amenable number.

79388678454220 is an abundant number, since it is smaller than the sum of its proper divisors (88857052953380).

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

79388678454220 is a wasteful number, since it uses less digits than its factorization.

79388678454220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36416825097 (or 36416825095 counting only the distinct ones).

The product of its (nonzero) digits is 1300561920, while the sum is 73.

The spelling of 79388678454220 in words is "seventy-nine trillion, three hundred eighty-eight billion, six hundred seventy-eight million, four hundred fifty-four thousand, two hundred twenty".