641001512536 has 128 divisors (see below), whose sum is σ = 1504192757760. Its totient is φ = 248784681600.

The previous prime is 641001512531. The next prime is 641001512539. The reversal of 641001512536 is 635215100146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641001512531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347049165 + ... + 347051011.

It is an arithmetic number, because the mean of its divisors is an integer number (11751505920).

Almost surely, 2^641001512536 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 641001512536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752096378880).

641001512536 is an abundant number, since it is smaller than the sum of its proper divisors (863191245224).

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

641001512536 is a wasteful number, since it uses less digits than its factorization.

641001512536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725 (or 3721 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 641001512536 in words is "six hundred forty-one billion, one million, five hundred twelve thousand, five hundred thirty-six".