421321662556 has 6 divisors (see below), whose sum is σ = 737312909480. Its totient is φ = 210660831276.

The previous prime is 421321662527. The next prime is 421321662581. The reversal of 421321662556 is 655266123124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52665207816 + ... + 52665207823.

Almost surely, 2^421321662556 is an apocalyptic number.

It is an amenable number.

421321662556 is a deficient number, since it is larger than the sum of its proper divisors (315991246924).

421321662556 is a wasteful number, since it uses less digits than its factorization.

421321662556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105330415643 (or 105330415641 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 421321662556 in words is "four hundred twenty-one billion, three hundred twenty-one million, six hundred sixty-two thousand, five hundred fifty-six".