12866755440 has 160 divisors (see below), whose sum is σ = 49729245696. Its totient is φ = 2673607680.

The previous prime is 12866755399. The next prime is 12866755477. The reversal of 12866755440 is 4455766821.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12866755440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329647 + ... + 366606.

Almost surely, 2^12866755440 is an apocalyptic number.

12866755440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12866755440 is an abundant number, since it is smaller than the sum of its proper divisors (36862490256).

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

12866755440 is a wasteful number, since it uses less digits than its factorization.

12866755440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696287 (or 696281 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 12866755440 in words is "twelve billion, eight hundred sixty-six million, seven hundred fifty-five thousand, four hundred forty".