421220639859 has 32 divisors (see below), whose sum is σ = 594764632320. Its totient is φ = 264428955648.

The previous prime is 421220639789. The next prime is 421220639869. The reversal of 421220639859 is 958936022124.

It is not a de Polignac number, because 421220639859 - 2²⁰ = 421219591283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421220639869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6264432 + ... + 6331314.

It is an arithmetic number, because the mean of its divisors is an integer number (18586394760).

Almost surely, 2^421220639859 is an apocalyptic number.

421220639859 is a deficient number, since it is larger than the sum of its proper divisors (173543992461).

421220639859 is a wasteful number, since it uses less digits than its factorization.

421220639859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67571.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 421220639859 in words is "four hundred twenty-one billion, two hundred twenty million, six hundred thirty-nine thousand, eight hundred fifty-nine".