421806856366 has 32 divisors (see below), whose sum is σ = 748778084352. Its totient is φ = 174391008480.

The previous prime is 421806856349. The next prime is 421806856417. The reversal of 421806856366 is 663658608124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1395396 + ... + 1670551.

It is an arithmetic number, because the mean of its divisors is an integer number (23399315136).

Almost surely, 2^421806856366 is an apocalyptic number.

421806856366 is a deficient number, since it is larger than the sum of its proper divisors (326971227986).

421806856366 is a wasteful number, since it uses less digits than its factorization.

421806856366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066304.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 421806856366 in words is "four hundred twenty-one billion, eight hundred six million, eight hundred fifty-six thousand, three hundred sixty-six".