79211554222640 has 40 divisors (see below), whose sum is σ = 210476415507360. Its totient is φ = 27158247161856.

The previous prime is 79211554222601. The next prime is 79211554222651. The reversal of 79211554222640 is 4622245511297.

It is a tau number, because it is divible by the number of its divisors (40).

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, 70724601425 + ... + 70724602544.

It is an arithmetic number, because the mean of its divisors is an integer number (5261910387684).

Almost surely, 2^{79211554222640} is an apocalyptic number.

79211554222640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79211554222640 is an abundant number, since it is smaller than the sum of its proper divisors (131264861284720).

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

79211554222640 is a wasteful number, since it uses less digits than its factorization.

79211554222640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141449203989 (or 141449203983 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 79211554222640 in words is "seventy-nine trillion, two hundred eleven billion, five hundred fifty-four million, two hundred twenty-two thousand, six hundred forty".