641034755840 has 144 divisors (see below), whose sum is σ = 1622021923200. Its totient is φ = 242057465856.

The previous prime is 641034755819. The next prime is 641034755857. The reversal of 641034755840 is 48557430146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6835991 + ... + 6929129.

Almost surely, 2^641034755840 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 641034755840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811010961600).

641034755840 is an abundant number, since it is smaller than the sum of its proper divisors (980987167360).

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

641034755840 is a wasteful number, since it uses less digits than its factorization.

641034755840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93462 (or 93448 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 641034755840 in words is "six hundred forty-one billion, thirty-four million, seven hundred fifty-five thousand, eight hundred forty".