641539314816 has 64 divisors (see below), whose sum is σ = 1727432562720. Its totient is φ = 210917025792.

The previous prime is 641539314809. The next prime is 641539314821. The reversal of 641539314816 is 618413935146.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×641539314816² (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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11414950 + ... + 11471013.

Almost surely, 2^641539314816 is an apocalyptic number.

It is an amenable number.

641539314816 is an abundant number, since it is smaller than the sum of its proper divisors (1085893247904).

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

641539314816 is a wasteful number, since it uses less digits than its factorization.

641539314816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22886053 (or 22886041 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The spelling of 641539314816 in words is "six hundred forty-one billion, five hundred thirty-nine million, three hundred fourteen thousand, eight hundred sixteen".