64585891 has 2 divisors, whose sum is σ = 64585892. Its totient is φ = 64585890.

The previous prime is 64585889. The next prime is 64585903. The reversal of 64585891 is 19858546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64585891 - 2¹ = 64585889 is a prime.

Together with 64585889, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64585811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32292945 + 32292946.

It is an arithmetic number, because the mean of its divisors is an integer number (32292946).

Almost surely, 2^64585891 is an apocalyptic number.

64585891 is a deficient number, since it is larger than the sum of its proper divisors (1).

64585891 is an equidigital number, since it uses as much as digits as its factorization.

64585891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 46.

The square root of 64585891 is about 8036.5347631924. The cubic root of 64585891 is about 401.2169003794.

The spelling of 64585891 in words is "sixty-four million, five hundred eighty-five thousand, eight hundred ninety-one".