12918680640 has 168 divisors, whose sum is σ = 46773754560. Its totient is φ = 3263652864.

The previous prime is 12918680581. The next prime is 12918680653. The reversal of 12918680640 is 4608681921.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63324 + ... + 172763.

Almost surely, 2^12918680640 is an apocalyptic number.

12918680640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12918680640 is an abundant number, since it is smaller than the sum of its proper divisors (33855073920).

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

12918680640 is a wasteful number, since it uses less digits than its factorization.

12918680640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236129 (or 236116 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 12918680640 in words is "twelve billion, nine hundred eighteen million, six hundred eighty thousand, six hundred forty".