421330402656 has 48 divisors (see below), whose sum is σ = 1228880343600. Its totient is φ = 140443467264.

The previous prime is 421330402639. The next prime is 421330402693. The reversal of 421330402656 is 656204033124.

421330402656 is a `hidden beast` number, since 4 + 21 + 330 + 40 + 265 + 6 = 666.

421330402656 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 421330402656.

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, 243824601 + ... + 243826328.

It is an arithmetic number, because the mean of its divisors is an integer number (25601673825).

Almost surely, 2^421330402656 is an apocalyptic number.

It is an amenable number.

421330402656 is an abundant number, since it is smaller than the sum of its proper divisors (807549940944).

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

421330402656 is a wasteful number, since it uses less digits than its factorization.

421330402656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487650948 (or 487650934 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 421330402656 in words is "four hundred twenty-one billion, three hundred thirty million, four hundred two thousand, six hundred fifty-six".