641960995708 has 12 divisors (see below), whose sum is σ = 1131631975152. Its totient is φ = 318637574240.

The previous prime is 641960995691. The next prime is 641960995723. The reversal of 641960995708 is 807599069146.

It is a super-2 number, since 2×641960995708² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641960995708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585730288 + ... + 585731383.

It is an arithmetic number, because the mean of its divisors is an integer number (94302664596).

Almost surely, 2^641960995708 is an apocalyptic number.

It is an amenable number.

641960995708 is a deficient number, since it is larger than the sum of its proper divisors (489670979444).

641960995708 is a wasteful number, since it uses less digits than its factorization.

641960995708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171461812 (or 1171461810 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 64.

The spelling of 641960995708 in words is "six hundred forty-one billion, nine hundred sixty million, nine hundred ninety-five thousand, seven hundred eight".