641186319866 has 16 divisors (see below), whose sum is σ = 1012520637600. Its totient is φ = 303683480208.

The previous prime is 641186319833. The next prime is 641186319913. The reversal of 641186319866 is 668913681146.

It is a super-2 number, since 2×641186319866² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686900 + ... + 1324463.

It is an arithmetic number, because the mean of its divisors is an integer number (63282539850).

Almost surely, 2^641186319866 is an apocalyptic number.

641186319866 is a deficient number, since it is larger than the sum of its proper divisors (371334317734).

641186319866 is a wasteful number, since it uses less digits than its factorization.

641186319866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019773.

The product of its digits is 8957952, while the sum is 59.

The spelling of 641186319866 in words is "six hundred forty-one billion, one hundred eighty-six million, three hundred nineteen thousand, eight hundred sixty-six".