421901131568 has 80 divisors (see below), whose sum is σ = 939824418816. Its totient is φ = 179729518080.

The previous prime is 421901131543. The next prime is 421901131637. The reversal of 421901131568 is 865131109124.

It is a happy number.

It is a super-2 number, since 2×421901131568² (a number of 24 digits) contains 22 as substring.

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, 30647855 + ... + 30661617.

Almost surely, 2^421901131568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421901131568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469912209408).

421901131568 is an abundant number, since it is smaller than the sum of its proper divisors (517923287248).

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

421901131568 is a wasteful number, since it uses less digits than its factorization.

421901131568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15402 (or 15396 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 421901131568 in words is "four hundred twenty-one billion, nine hundred one million, one hundred thirty-one thousand, five hundred sixty-eight".