641169861150 has 384 divisors, whose sum is σ = 1998232104960. Its totient is φ = 132444149760.

The previous prime is 641169861149. The next prime is 641169861181. The reversal of 641169861150 is 51168961146.

It is a super-2 number, since 2×641169861150² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641169861150.

It is a congruent number.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 617102331 + ... + 617103369.

It is an arithmetic number, because the mean of its divisors is an integer number (5203729440).

Almost surely, 2^641169861150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641169861150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999116052480).

641169861150 is an abundant number, since it is smaller than the sum of its proper divisors (1357062243810).

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

641169861150 is a wasteful number, since it uses less digits than its factorization.

641169861150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 641169861150 in words is "six hundred forty-one billion, one hundred sixty-nine million, eight hundred sixty-one thousand, one hundred fifty".