641572064 has 48 divisors (see below), whose sum is σ = 1449415296. Its totient is φ = 273840000.

The previous prime is 641572039. The next prime is 641572081. The reversal of 641572064 is 460275146.

641572064 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 2×641572064² = 823229426610440192, which contains 22 as substring.

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, 50519 + ... + 61929.

It is an arithmetic number, because the mean of its divisors is an integer number (30196152).

Almost surely, 2^641572064 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 641572064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724707648).

641572064 is an abundant number, since it is smaller than the sum of its proper divisors (807843232).

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

641572064 is a wasteful number, since it uses less digits than its factorization.

641572064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11679 (or 11671 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 641572064 is about 25329.2728675736. The cubic root of 641572064 is about 862.4789051481.

The spelling of 641572064 in words is "six hundred forty-one million, five hundred seventy-two thousand, sixty-four".