12451262640 has 40 divisors (see below), whose sum is σ = 38598914928. Its totient is φ = 3320336640.

The previous prime is 12451262611. The next prime is 12451262737. The reversal of 12451262640 is 4626215421.

It is a tau number, because it is divible by the number of its divisors (40).

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, 25939891 + ... + 25940370.

Almost surely, 2^12451262640 is an apocalyptic number.

12451262640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12451262640 is an abundant number, since it is smaller than the sum of its proper divisors (26147652288).

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

12451262640 is a wasteful number, since it uses less digits than its factorization.

12451262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51880277 (or 51880271 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 12451262640 in words is "twelve billion, four hundred fifty-one million, two hundred sixty-two thousand, six hundred forty".