641563063016 has 8 divisors (see below), whose sum is σ = 1202930743170. Its totient is φ = 320781531504.

The previous prime is 641563063003. The next prime is 641563063027. The reversal of 641563063016 is 610360365146.

It can be written as a sum of positive squares in only one way, i.e., 360084004900 + 281479058116 = 600070^2 + 530546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40097691431 + ... + 40097691446.

Almost surely, 2^641563063016 is an apocalyptic number.

It is an amenable number.

641563063016 is a deficient number, since it is larger than the sum of its proper divisors (561367680154).

641563063016 is a wasteful number, since it uses less digits than its factorization.

641563063016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80195382883 (or 80195382879 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 641563063016 in words is "six hundred forty-one billion, five hundred sixty-three million, sixty-three thousand, sixteen".