79155821888 has 112 divisors (see below), whose sum is σ = 184780854720. Its totient is φ = 33168076800.

The previous prime is 79155821867. The next prime is 79155821903. The reversal of 79155821888 is 88812855197.

It is a self number, because there is not a number n which added to its sum of digits gives 79155821888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7398623 + ... + 7409313.

It is an arithmetic number, because the mean of its divisors is an integer number (1649829060).

Almost surely, 2^79155821888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79155821888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92390427360).

79155821888 is an abundant number, since it is smaller than the sum of its proper divisors (105625032832).

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

79155821888 is a wasteful number, since it uses less digits than its factorization.

79155821888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11536 (or 11526 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 62.

The spelling of 79155821888 in words is "seventy-nine billion, one hundred fifty-five million, eight hundred twenty-one thousand, eight hundred eighty-eight".