641707965560 has 128 divisors (see below), whose sum is σ = 1487364249600. Its totient is φ = 249080832000.

The previous prime is 641707965557. The next prime is 641707965653. The reversal of 641707965560 is 65569707146.

641707965560 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 2×641707965560² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641707965496 and 641707965505.

It is a congruent number.

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, 74258840 + ... + 74267480.

It is an arithmetic number, because the mean of its divisors is an integer number (11620033200).

Almost surely, 2^641707965560 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 641707965560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743682124800).

641707965560 is an abundant number, since it is smaller than the sum of its proper divisors (845656284040).

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

641707965560 is a wasteful number, since it uses less digits than its factorization.

641707965560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133 (or 9129 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 56.

The spelling of 641707965560 in words is "six hundred forty-one billion, seven hundred seven million, nine hundred sixty-five thousand, five hundred sixty".