64591894 has 8 divisors (see below), whose sum is σ = 97138080. Its totient is φ = 32212536.

The previous prime is 64591861. The next prime is 64591907. The reversal of 64591894 is 49819546.

It is a happy number.

64591894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64591894² = 8344225541014472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40734 + ... + 42289.

It is an arithmetic number, because the mean of its divisors is an integer number (12142260).

Almost surely, 2^64591894 is an apocalyptic number.

64591894 is a deficient number, since it is larger than the sum of its proper divisors (32546186).

64591894 is a wasteful number, since it uses less digits than its factorization.

64591894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83414.

The product of its digits is 311040, while the sum is 46.

The square root of 64591894 is about 8036.9082363805. The cubic root of 64591894 is about 401.2293304959.

The spelling of 64591894 in words is "sixty-four million, five hundred ninety-one thousand, eight hundred ninety-four".