641017502566 has 16 divisors (see below), whose sum is σ = 1101948122880. Its totient is φ = 273956542920.

The previous prime is 641017502533. The next prime is 641017502591. The reversal of 641017502566 is 665205710146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63765120 + ... + 63775171.

It is an arithmetic number, because the mean of its divisors is an integer number (68871757680).

Almost surely, 2^641017502566 is an apocalyptic number.

641017502566 is a deficient number, since it is larger than the sum of its proper divisors (460930620314).

641017502566 is a wasteful number, since it uses less digits than its factorization.

641017502566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127540659.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 641017502566 in words is "six hundred forty-one billion, seventeen million, five hundred two thousand, five hundred sixty-six".