641168 has 20 divisors (see below), whose sum is σ = 1355568. Its totient is φ = 291360.

The previous prime is 641167. The next prime is 641197. The reversal of 641168 is 861146.

It is a super-2 number, since 2×641168² = 822192808448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (641167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1646 + ... + 1997.

2⁶⁴¹¹⁶⁸ is an apocalyptic number.

It is an amenable number.

641168 is an abundant number, since it is smaller than the sum of its proper divisors (714400).

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

641168 is a wasteful number, since it uses less digits than its factorization.

641168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662 (or 3656 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 641168 is about 800.7296672411. The cubic root of 641168 is about 86.2297803194.

The spelling of 641168 in words is "six hundred forty-one thousand, one hundred sixty-eight".