641623875 has 16 divisors (see below), whose sum is σ = 1067662752. Its totient is φ = 342199200.

The previous prime is 641623849. The next prime is 641623897. The reversal of 641623875 is 578326146.

It is not a de Polignac number, because 641623875 - 2⁷ = 641623747 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855124 + ... + 855873.

It is an arithmetic number, because the mean of its divisors is an integer number (66728922).

Almost surely, 2^641623875 is an apocalyptic number.

641623875 is a deficient number, since it is larger than the sum of its proper divisors (426038877).

641623875 is a wasteful number, since it uses less digits than its factorization.

641623875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711015 (or 1711005 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 641623875 is about 25330.2955963802. The cubic root of 641623875 is about 862.5021213978.

The spelling of 641623875 in words is "six hundred forty-one million, six hundred twenty-three thousand, eight hundred seventy-five".