641951830290216 has 64 divisors (see below), whose sum is σ = 1612006257873600. Its totient is φ = 213033856508928.

The previous prime is 641951830290209. The next prime is 641951830290269. The reversal of 641951830290216 is 612092038159146.

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, 70608256 + ... + 79179728.

It is an arithmetic number, because the mean of its divisors is an integer number (25187597779275).

Almost surely, 2^{641951830290216} is an apocalyptic number.

It is an amenable number.

641951830290216 is an abundant number, since it is smaller than the sum of its proper divisors (970054427583384).

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

641951830290216 is a wasteful number, since it uses less digits than its factorization.

641951830290216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8585338 (or 8585334 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 641951830290216 in words is "six hundred forty-one trillion, nine hundred fifty-one billion, eight hundred thirty million, two hundred ninety thousand, two hundred sixteen".