641655956316 has 48 divisors (see below), whose sum is σ = 1583188927488. Its totient is φ = 201937353600.

The previous prime is 641655956309. The next prime is 641655956327. The reversal of 641655956316 is 613659556146.

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, 21019890 + ... + 21050393.

It is an arithmetic number, because the mean of its divisors is an integer number (32983102656).

Almost surely, 2^641655956316 is an apocalyptic number.

It is an amenable number.

641655956316 is an abundant number, since it is smaller than the sum of its proper divisors (941532971172).

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

641655956316 is a wasteful number, since it uses less digits than its factorization.

641655956316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42070362 (or 42070360 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 57.

The spelling of 641655956316 in words is "six hundred forty-one billion, six hundred fifty-five million, nine hundred fifty-six thousand, three hundred sixteen".