641408574 has 16 divisors (see below), whose sum is σ = 1350334080. Its totient is φ = 202550040.

The previous prime is 641408549. The next prime is 641408591. The reversal of 641408574 is 475804146.

It is a super-2 number, since 2×641408574² = 822809917601426952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2813082 + ... + 2813309.

It is an arithmetic number, because the mean of its divisors is an integer number (84395880).

Almost surely, 2^641408574 is an apocalyptic number.

641408574 is an abundant number, since it is smaller than the sum of its proper divisors (708925506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641408574 is a wasteful number, since it uses less digits than its factorization.

641408574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626415.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 641408574 is about 25326.0453683555. The cubic root of 641408574 is about 862.4056379018.

The spelling of 641408574 in words is "six hundred forty-one million, four hundred eight thousand, five hundred seventy-four".