641573954 has 32 divisors (see below), whose sum is σ = 1158528000. Its totient is φ = 266081760.

The previous prime is 641573953. The next prime is 641573971. The reversal of 641573954 is 459375146.

It is not an unprimeable number, because it can be changed into a prime (641573953) 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 15 ways as a sum of consecutive naturals, for example, 6182 + ... + 36350.

It is an arithmetic number, because the mean of its divisors is an integer number (36204000).

Almost surely, 2^641573954 is an apocalyptic number.

641573954 is a deficient number, since it is larger than the sum of its proper divisors (516954046).

641573954 is a wasteful number, since it uses less digits than its factorization.

641573954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30223 (or 30209 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 641573954 is about 25329.3101761576. The cubic root of 641573954 is about 862.4797520696.

The spelling of 641573954 in words is "six hundred forty-one million, five hundred seventy-three thousand, nine hundred fifty-four".