641085867 has 8 divisors (see below), whose sum is σ = 949756880. Its totient is φ = 427390560.

The previous prime is 641085853. The next prime is 641085937. The reversal of 641085867 is 768580146.

It is a happy number.

641085867 is a `hidden beast` number, since 64 + 1 + 0 + 8 + 586 + 7 = 666.

641085867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641085867 - 2²⁰ = 640037291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641085817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11871934 + ... + 11871987.

It is an arithmetic number, because the mean of its divisors is an integer number (118719610).

Almost surely, 2^641085867 is an apocalyptic number.

641085867 is a deficient number, since it is larger than the sum of its proper divisors (308671013).

641085867 is a wasteful number, since it uses less digits than its factorization.

641085867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23743930 (or 23743924 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 641085867 is about 25319.6735168525. The cubic root of 641085867 is about 862.2609817839.

The spelling of 641085867 in words is "six hundred forty-one million, eighty-five thousand, eight hundred sixty-seven".