641143511000 has 128 divisors (see below), whose sum is σ = 1545426043200. Its totient is φ = 248780851200.

The previous prime is 641143510979. The next prime is 641143511003. The reversal of 641143511000 is 115341146.

It is a super-2 number, since 2×641143511000² (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 (641143511003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12443291 + ... + 12494709.

Almost surely, 2^641143511000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641143511000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772713021600).

641143511000 is an abundant number, since it is smaller than the sum of its proper divisors (904282532200).

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

641143511000 is a wasteful number, since it uses less digits than its factorization.

641143511000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51814 (or 51800 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 641143511000 its reverse (115341146), we get a palindrome (641258852146).

The spelling of 641143511000 in words is "six hundred forty-one billion, one hundred forty-three million, five hundred eleven thousand".