641218858932 has 12 divisors (see below), whose sum is σ = 1496177337536. Its totient is φ = 213739619640.

The previous prime is 641218858921. The next prime is 641218858939. The reversal of 641218858932 is 239858812146.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×641218858932² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641218858939) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26717452444 + ... + 26717452467.

Almost surely, 2^641218858932 is an apocalyptic number.

It is an amenable number.

641218858932 is an abundant number, since it is smaller than the sum of its proper divisors (854958478604).

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

641218858932 is a wasteful number, since it uses less digits than its factorization.

641218858932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53434904918 (or 53434904916 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 57.

The spelling of 641218858932 in words is "six hundred forty-one billion, two hundred eighteen million, eight hundred fifty-eight thousand, nine hundred thirty-two".