641032541860 has 96 divisors (see below), whose sum is σ = 1453603021920. Its totient is φ = 236555624448.

The previous prime is 641032541813. The next prime is 641032541879. The reversal of 641032541860 is 68145230146.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 18625152676 + 622407389184 = 136474^2 + 788928^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19968142 + ... + 20000218.

It is an arithmetic number, because the mean of its divisors is an integer number (15141698145).

Almost surely, 2^641032541860 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 641032541860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726801510960).

641032541860 is an abundant number, since it is smaller than the sum of its proper divisors (812570480060).

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

641032541860 is a wasteful number, since it uses less digits than its factorization.

641032541860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33265 (or 33263 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 641032541860 in words is "six hundred forty-one billion, thirty-two million, five hundred forty-one thousand, eight hundred sixty".