12640575880 has 64 divisors (see below), whose sum is σ = 28876176000. Its totient is φ = 4979089920.

The previous prime is 12640575877. The next prime is 12640575901. The reversal of 12640575880 is 8857504621.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12640575880.

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, 2977039 + ... + 2981281.

It is an arithmetic number, because the mean of its divisors is an integer number (451190250).

Almost surely, 2^12640575880 is an apocalyptic number.

12640575880 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 12640575880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14438088000).

12640575880 is an abundant number, since it is smaller than the sum of its proper divisors (16235600120).

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

12640575880 is a wasteful number, since it uses less digits than its factorization.

12640575880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374 (or 5370 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 12640575880 in words is "twelve billion, six hundred forty million, five hundred seventy-five thousand, eight hundred eighty".