79421212544 has 64 divisors (see below), whose sum is σ = 170029866960. Its totient is φ = 36816789504.

The previous prime is 79421212543. The next prime is 79421212547. The reversal of 79421212544 is 44521212497.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79421212543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126587 + ... + 418170.

Almost surely, 2^79421212544 is an apocalyptic number.

It is an amenable number.

79421212544 is an abundant number, since it is smaller than the sum of its proper divisors (90608654416).

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

79421212544 is a wasteful number, since it uses less digits than its factorization.

79421212544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544855 (or 544843 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The spelling of 79421212544 in words is "seventy-nine billion, four hundred twenty-one million, two hundred twelve thousand, five hundred forty-four".