621212198484 has 48 divisors (see below), whose sum is σ = 1452341334528. Its totient is φ = 206664319968.

The previous prime is 621212198447. The next prime is 621212198491. The reversal of 621212198484 is 484891212126.

It is a super-2 number, since 2×621212198484² (a number of 24 digits) contains 22 as substring.

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, 34527739 + ... + 34545725.

It is an arithmetic number, because the mean of its divisors is an integer number (30257111136).

Almost surely, 2^621212198484 is an apocalyptic number.

It is an amenable number.

621212198484 is an abundant number, since it is smaller than the sum of its proper divisors (831129136044).

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

621212198484 is a wasteful number, since it uses less digits than its factorization.

621212198484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23484 (or 23482 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The spelling of 621212198484 in words is "six hundred twenty-one billion, two hundred twelve million, one hundred ninety-eight thousand, four hundred eighty-four".