12717777320 has 64 divisors (see below), whose sum is σ = 29928096000. Its totient is φ = 4854693888.

The previous prime is 12717777283. The next prime is 12717777353. The reversal of 12717777320 is 2377771721.

It is a super-2 number, since 2×12717777320² (a number of 21 digits) contains 22 as substring.

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, 388136 + ... + 419624.

It is an arithmetic number, because the mean of its divisors is an integer number (467626500).

Almost surely, 2^12717777320 is an apocalyptic number.

12717777320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12717777320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14964048000).

12717777320 is an abundant number, since it is smaller than the sum of its proper divisors (17210318680).

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

12717777320 is a wasteful number, since it uses less digits than its factorization.

12717777320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31962 (or 31958 counting only the distinct ones).

The product of its (nonzero) digits is 201684, while the sum is 44.

The spelling of 12717777320 in words is "twelve billion, seven hundred seventeen million, seven hundred seventy-seven thousand, three hundred twenty".