641870025 has 24 divisors (see below), whose sum is σ = 1061967744. Its totient is φ = 342091200.

The previous prime is 641869961. The next prime is 641870029. The reversal of 641870025 is 520078146.

It is not a de Polignac number, because 641870025 - 2⁶ = 641869961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641870029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174960 + ... + 178590.

It is an arithmetic number, because the mean of its divisors is an integer number (44248656).

Almost surely, 2^641870025 is an apocalyptic number.

It is an amenable number.

641870025 is a deficient number, since it is larger than the sum of its proper divisors (420097719).

641870025 is a wasteful number, since it uses less digits than its factorization.

641870025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001 (or 5996 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 641870025 is about 25335.1539367733. The cubic root of 641870025 is about 862.6124029101.

The spelling of 641870025 in words is "six hundred forty-one million, eight hundred seventy thousand, twenty-five".