12645390456 has 24 divisors (see below), whose sum is σ = 34247932680. Its totient is φ = 4215130128.

The previous prime is 12645390431. The next prime is 12645390487. The reversal of 12645390456 is 65409354621.

12645390456 is a `hidden beast` number, since 1 + 2 + 64 + 53 + 90 + 456 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87815140 + ... + 87815283.

It is an arithmetic number, because the mean of its divisors is an integer number (1426997195).

Almost surely, 2^12645390456 is an apocalyptic number.

It is an amenable number.

12645390456 is an abundant number, since it is smaller than the sum of its proper divisors (21602542224).

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

12645390456 is a wasteful number, since it uses less digits than its factorization.

12645390456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175630435 (or 175630428 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 12645390456 in words is "twelve billion, six hundred forty-five million, three hundred ninety thousand, four hundred fifty-six".