641685475 has 12 divisors (see below), whose sum is σ = 809178120. Its totient is φ = 504646400.

The previous prime is 641685467. The next prime is 641685497. The reversal of 641685475 is 574586146.

It is not a de Polignac number, because 641685475 - 2³ = 641685467 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216046 + ... + 218995.

It is an arithmetic number, because the mean of its divisors is an integer number (67431510).

Almost surely, 2^641685475 is an apocalyptic number.

641685475 is a deficient number, since it is larger than the sum of its proper divisors (167492645).

641685475 is a wasteful number, since it uses less digits than its factorization.

641685475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435110 (or 435105 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The square root of 641685475 is about 25331.5115024745. The cubic root of 641685475 is about 862.5297224232.

The spelling of 641685475 in words is "six hundred forty-one million, six hundred eighty-five thousand, four hundred seventy-five".