621252934416 has 135 divisors (see below), whose sum is σ = 1835500159701. Its totient is φ = 196128387072.

The previous prime is 621252934331. The next prime is 621252934441. The reversal of 621252934416 is 614439252126.

The square root of 621252934416 is 788196.

It is a perfect power (a square), and thus also a powerful number.

621252934416 is a `hidden beast` number, since 62 + 12 + 52 + 93 + 441 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8952944400 + 612299990016 = 94620^2 + 782496^2 .

It is a super-2 number, since 2×621252934416² (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 26 ways as a sum of consecutive naturals, for example, 179706960 + ... + 179710416.

Almost surely, 2^621252934416 is an apocalyptic number.

621252934416 is the 788196-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621252934416

621252934416 is an abundant number, since it is smaller than the sum of its proper divisors (1214247225285).

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

621252934416 is an equidigital number, since it uses as much as digits as its factorization.

621252934416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6966 (or 3481 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 621252934416 in words is "six hundred twenty-one billion, two hundred fifty-two million, nine hundred thirty-four thousand, four hundred sixteen".