12640759880 has 64 divisors (see below), whose sum is σ = 33260768640. Its totient is φ = 4233180672.

The previous prime is 12640759871. The next prime is 12640759889. The reversal of 12640759880 is 8895704621.

It is an interprime number because it is at equal distance from previous prime (12640759871) and next prime (12640759889).

It is a super-2 number, since 2×12640759880² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12640759889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512909 + ... + 536988.

It is an arithmetic number, because the mean of its divisors is an integer number (519699510).

Almost surely, 2^12640759880 is an apocalyptic number.

12640759880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12640759880 is an abundant number, since it is smaller than the sum of its proper divisors (20620008760).

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

12640759880 is a wasteful number, since it uses less digits than its factorization.

12640759880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049958 (or 1049954 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 12640759880 in words is "twelve billion, six hundred forty million, seven hundred fifty-nine thousand, eight hundred eighty".