641344662 has 64 divisors (see below), whose sum is σ = 1632038400. Its totient is φ = 182878560.

The previous prime is 641344661. The next prime is 641344663. The reversal of 641344662 is 266443146.

641344662 is a `hidden beast` number, since 64 + 134 + 466 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (641344661) and next prime (641344663).

It is a super-2 number, since 2×641344662² = 822645950951788488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641344661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232612 + ... + 235352.

It is an arithmetic number, because the mean of its divisors is an integer number (25500600).

Almost surely, 2^641344662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641344662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816019200).

641344662 is an abundant number, since it is smaller than the sum of its proper divisors (990693738).

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

641344662 is a wasteful number, since it uses less digits than its factorization.

641344662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378 (or 3372 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 641344662 is about 25324.7835528756. The cubic root of 641344662 is about 862.3769926658.

The spelling of 641344662 in words is "six hundred forty-one million, three hundred forty-four thousand, six hundred sixty-two".