641189862 has 12 divisors (see below), whose sum is σ = 1389244740. Its totient is φ = 213729948.

The previous prime is 641189851. The next prime is 641189873. The reversal of 641189862 is 268981146.

It is an interprime number because it is at equal distance from previous prime (641189851) and next prime (641189873).

It is a super-2 number, since 2×641189862² = 822248878263158088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17810812 + ... + 17810847.

It is an arithmetic number, because the mean of its divisors is an integer number (115770395).

Almost surely, 2^641189862 is an apocalyptic number.

641189862 is an abundant number, since it is smaller than the sum of its proper divisors (748054878).

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

641189862 is a wasteful number, since it uses less digits than its factorization.

641189862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35621667 (or 35621664 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 641189862 is about 25321.7270737997. The cubic root of 641189862 is about 862.3076037146.

The spelling of 641189862 in words is "six hundred forty-one million, one hundred eighty-nine thousand, eight hundred sixty-two".