641945304 has 256 divisors, whose sum is σ = 2395008000. Its totient is φ = 153861120.

The previous prime is 641945299. The next prime is 641945357. The reversal of 641945304 is 403549146.

641945304 is a `hidden beast` number, since 641 + 9 + 4 + 5 + 3 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214732 + ... + 217700.

It is an arithmetic number, because the mean of its divisors is an integer number (9355500).

Almost surely, 2^641945304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641945304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197504000).

641945304 is an abundant number, since it is smaller than the sum of its proper divisors (1753062696).

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

641945304 is a wasteful number, since it uses less digits than its factorization.

641945304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015 (or 3005 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 641945304 is about 25336.6395561842. The cubic root of 641945304 is about 862.6461242026.

The spelling of 641945304 in words is "six hundred forty-one million, nine hundred forty-five thousand, three hundred four".