641707580 has 24 divisors (see below), whose sum is σ = 1350072528. Its totient is φ = 256209408.

The previous prime is 641707543. The next prime is 641707597. The reversal of 641707580 is 85707146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18389 + ... + 40268.

It is an arithmetic number, because the mean of its divisors is an integer number (56253022).

Almost surely, 2^641707580 is an apocalyptic number.

It is an amenable number.

641707580 is an abundant number, since it is smaller than the sum of its proper divisors (708364948).

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

641707580 is a wasteful number, since it uses less digits than its factorization.

641707580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59213 (or 59211 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 641707580 is about 25331.9478129890. The cubic root of 641707580 is about 862.5396265488.

The spelling of 641707580 in words is "six hundred forty-one million, seven hundred seven thousand, five hundred eighty".