12651420440 has 32 divisors (see below), whose sum is σ = 29127692880. Its totient is φ = 4942879872.

The previous prime is 12651420409. The next prime is 12651420479. The reversal of 12651420440 is 4402415621.

It is a congruent number.

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, 3676019 + ... + 3679458.

Almost surely, 2^12651420440 is an apocalyptic number.

12651420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12651420440 is an abundant number, since it is smaller than the sum of its proper divisors (16476272440).

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

12651420440 is a wasteful number, since it uses less digits than its factorization.

12651420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355531 (or 7355527 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 12651420440 in words is "twelve billion, six hundred fifty-one million, four hundred twenty thousand, four hundred forty".