621606601225 has 6 divisors (see below), whose sum is σ = 770792185550. Its totient is φ = 497285280960.

The previous prime is 621606601183. The next prime is 621606601237. The reversal of 621606601225 is 522106606126.

It can be written as a sum of positive squares in 3 ways, for example, as 99519428089 + 522087173136 = 315467^2 + 722556^2 .

It is not a de Polignac number, because 621606601225 - 2⁷ = 621606601097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12432132000 + ... + 12432132049.

Almost surely, 2^621606601225 is an apocalyptic number.

It is an amenable number.

621606601225 is a deficient number, since it is larger than the sum of its proper divisors (149185584325).

621606601225 is a wasteful number, since it uses less digits than its factorization.

621606601225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24864264059 (or 24864264054 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 621606601225 in words is "six hundred twenty-one billion, six hundred six million, six hundred one thousand, two hundred twenty-five".