641845475 has 24 divisors (see below), whose sum is σ = 852966240. Its totient is φ = 477861120.

The previous prime is 641845471. The next prime is 641845493. The reversal of 641845475 is 574548146.

It is not a de Polignac number, because 641845475 - 2² = 641845471 is a prime.

It is a super-2 number, since 2×641845475² = 823931227555951250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (641845471) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6191 + ... + 36359.

It is an arithmetic number, because the mean of its divisors is an integer number (35540260).

Almost surely, 2^641845475 is an apocalyptic number.

641845475 is a deficient number, since it is larger than the sum of its proper divisors (211120765).

641845475 is a wasteful number, since it uses less digits than its factorization.

641845475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30239 (or 30234 counting only the distinct ones).

The product of its digits is 537600, while the sum is 44.

The square root of 641845475 is about 25334.6694274861. The cubic root of 641845475 is about 862.6014051465.

The spelling of 641845475 in words is "six hundred forty-one million, eight hundred forty-five thousand, four hundred seventy-five".