646522250100225 has 24 divisors (see below), whose sum is σ = 1068925131600480. Its totient is φ = 344809174859520.

The previous prime is 646522250100157. The next prime is 646522250100247. The reversal of 646522250100225 is 522001052225646.

It is not a de Polignac number, because 646522250100225 - 2¹¹ = 646522250098177 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23958664 + ... + 43209513.

It is an arithmetic number, because the mean of its divisors is an integer number (44538547150020).

Almost surely, 2^{646522250100225} is an apocalyptic number.

It is an amenable number.

646522250100225 is a deficient number, since it is larger than the sum of its proper divisors (422402881500255).

646522250100225 is a wasteful number, since it uses less digits than its factorization.

646522250100225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67296529 (or 67296524 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 646522250100225 in words is "six hundred forty-six trillion, five hundred twenty-two billion, two hundred fifty million, one hundred thousand, two hundred twenty-five".