420531116331660 has 96 divisors (see below), whose sum is σ = 1204638456817152. Its totient is φ = 109583745008640.

The previous prime is 420531116331653. The next prime is 420531116331679. The reversal of 420531116331660 is 66133611135024.

It is a super-4 number, since 4×420531116331660⁴ (a number of 60 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436316074 + ... + 437278833.

It is an arithmetic number, because the mean of its divisors is an integer number (12548317258512).

Almost surely, 2^{420531116331660} is an apocalyptic number.

It is an amenable number.

420531116331660 is an abundant number, since it is smaller than the sum of its proper divisors (784107340485492).

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

420531116331660 is a wasteful number, since it uses less digits than its factorization.

420531116331660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873595103 (or 873595101 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

Adding to 420531116331660 its reverse (66133611135024), we get a palindrome (486664727466684).

The spelling of 420531116331660 in words is "four hundred twenty trillion, five hundred thirty-one billion, one hundred sixteen million, three hundred thirty-one thousand, six hundred sixty".