12687745400 has 72 divisors (see below), whose sum is σ = 32424591360. Its totient is φ = 4613716800.

The previous prime is 12687745397. The next prime is 12687745471. The reversal of 12687745400 is 454778621.

It is a super-4 number, since 4×12687745400⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

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 17 ways as a sum of consecutive naturals, for example, 237944 + ... + 286343.

Almost surely, 2^12687745400 is an apocalyptic number.

12687745400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12687745400 is an abundant number, since it is smaller than the sum of its proper divisors (19736845960).

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

12687745400 is a wasteful number, since it uses less digits than its factorization.

12687745400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524325 (or 524305 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 12687745400 in words is "twelve billion, six hundred eighty-seven million, seven hundred forty-five thousand, four hundred".