12420828864 has 84 divisors (see below), whose sum is σ = 37696332024. Its totient is φ = 3896727552.

The previous prime is 12420828853. The next prime is 12420828899. The reversal of 12420828864 is 46882802421.

12420828864 is a `hidden beast` number, since 12 + 420 + 82 + 88 + 64 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 624442 + ... + 644025.

Almost surely, 2^12420828864 is an apocalyptic number.

It is an amenable number.

12420828864 is an abundant number, since it is smaller than the sum of its proper divisors (25275503160).

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

12420828864 is a wasteful number, since it uses less digits than its factorization.

12420828864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268502 (or 1268489 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The spelling of 12420828864 in words is "twelve billion, four hundred twenty million, eight hundred twenty-eight thousand, eight hundred sixty-four".