641315064 has 32 divisors (see below), whose sum is σ = 1726618320. Its totient is φ = 197327616.

The previous prime is 641315063. The next prime is 641315069. The reversal of 641315064 is 460513146.

641315064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641315064² = 822570022626648192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641315063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027437 + ... + 1028060.

Almost surely, 2^641315064 is an apocalyptic number.

It is an amenable number.

641315064 is an abundant number, since it is smaller than the sum of its proper divisors (1085303256).

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

641315064 is a wasteful number, since it uses less digits than its factorization.

641315064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055519 (or 2055515 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 641315064 is about 25324.1991778615. The cubic root of 641315064 is about 862.3637262542.

The spelling of 641315064 in words is "six hundred forty-one million, three hundred fifteen thousand, sixty-four".