12640168860 has 48 divisors (see below), whose sum is σ = 38609972352. Its totient is φ = 3064283200.

The previous prime is 12640168829. The next prime is 12640168883. The reversal of 12640168860 is 6886104621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9575226 + ... + 9576545.

It is an arithmetic number, because the mean of its divisors is an integer number (804374424).

Almost surely, 2^12640168860 is an apocalyptic number.

12640168860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12640168860 is an abundant number, since it is smaller than the sum of its proper divisors (25969803492).

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

12640168860 is a wasteful number, since it uses less digits than its factorization.

12640168860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151794 (or 19151792 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 12640168860 in words is "twelve billion, six hundred forty million, one hundred sixty-eight thousand, eight hundred sixty".