641897610 has 16 divisors (see below), whose sum is σ = 1540554336. Its totient is φ = 171172688.

The previous prime is 641897609. The next prime is 641897647. The reversal of 641897610 is 16798146.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10698264 + ... + 10698323.

It is an arithmetic number, because the mean of its divisors is an integer number (96284646).

Almost surely, 2^641897610 is an apocalyptic number.

641897610 is an abundant number, since it is smaller than the sum of its proper divisors (898656726).

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

641897610 is a wasteful number, since it uses less digits than its factorization.

641897610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21396597.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 641897610 is about 25335.6983325899. The cubic root of 641897610 is about 862.6247599405.

The spelling of 641897610 in words is "six hundred forty-one million, eight hundred ninety-seven thousand, six hundred ten".