641588980 has 24 divisors (see below), whose sum is σ = 1351600488. Its totient is φ = 255823488.

The previous prime is 641588971. The next prime is 641588999. The reversal of 641588980 is 89885146.

It can be written as a sum of positive squares in 4 ways, for example, as 49056016 + 592532964 = 7004^2 + 24342^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44259 + ... + 56938.

It is an arithmetic number, because the mean of its divisors is an integer number (56316687).

Almost surely, 2^641588980 is an apocalyptic number.

It is an amenable number.

641588980 is an abundant number, since it is smaller than the sum of its proper divisors (710011508).

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

641588980 is a wasteful number, since it uses less digits than its factorization.

641588980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101523 (or 101521 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 641588980 is about 25329.6067873151. The cubic root of 641588980 is about 862.4864852605.

The spelling of 641588980 in words is "six hundred forty-one million, five hundred eighty-eight thousand, nine hundred eighty".