12641585388 has 24 divisors (see below), whose sum is σ = 29506830192. Its totient is φ = 4212462144.

The previous prime is 12641585377. The next prime is 12641585399. The reversal of 12641585388 is 88358514621.

It is an interprime number because it is at equal distance from previous prime (12641585377) and next prime (12641585399).

It is a super-2 number, since 2×12641585388² (a number of 21 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 12641585388.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136995 + ... + 209882.

It is an arithmetic number, because the mean of its divisors is an integer number (1229451258).

Almost surely, 2^12641585388 is an apocalyptic number.

It is an amenable number.

12641585388 is an abundant number, since it is smaller than the sum of its proper divisors (16865244804).

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

12641585388 is a wasteful number, since it uses less digits than its factorization.

12641585388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349921 (or 349919 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 51.

The spelling of 12641585388 in words is "twelve billion, six hundred forty-one million, five hundred eighty-five thousand, three hundred eighty-eight".