621661114144100 has 36 divisors (see below), whose sum is σ = 1395522018309300. Its totient is φ = 240089809599360.

The previous prime is 621661114144097. The next prime is 621661114144163. The reversal of 621661114144100 is 1441411166126.

It can be written as a sum of positive squares in 6 ways, for example, as 15295310890084 + 606365803254016 = 3910922^2 + 24624496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107182947815 + ... + 107182953614.

Almost surely, 2^{621661114144100} is an apocalyptic number.

It is an amenable number.

621661114144100 is an abundant number, since it is smaller than the sum of its proper divisors (773860904165200).

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

621661114144100 is a wasteful number, since it uses less digits than its factorization.

621661114144100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214365901472 (or 214365901465 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 621661114144100 in words is "six hundred twenty-one trillion, six hundred sixty-one billion, one hundred fourteen million, one hundred forty-four thousand, one hundred".