122926779816 has 128 divisors (see below), whose sum is σ = 330568335360. Its totient is φ = 37954022400.

The previous prime is 122926779809. The next prime is 122926779839. The reversal of 122926779816 is 618977629221.

It is a super-2 number, since 2×122926779816² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122926779816.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17580081 + ... + 17587071.

It is an arithmetic number, because the mean of its divisors is an integer number (2582565120).

Almost surely, 2^122926779816 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 122926779816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165284167680).

122926779816 is an abundant number, since it is smaller than the sum of its proper divisors (207641555544).

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

122926779816 is a wasteful number, since it uses less digits than its factorization.

122926779816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695 (or 7691 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 60.

The spelling of 122926779816 in words is "one hundred twenty-two billion, nine hundred twenty-six million, seven hundred seventy-nine thousand, eight hundred sixteen".