64856695 has 4 divisors (see below), whose sum is σ = 77828040. Its totient is φ = 51885352.

The previous prime is 64856669. The next prime is 64856719. The reversal of 64856695 is 59665846.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64856695 - 2¹³ = 64848503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6485665 + ... + 6485674.

It is an arithmetic number, because the mean of its divisors is an integer number (19457010).

Almost surely, 2^64856695 is an apocalyptic number.

64856695 is a deficient number, since it is larger than the sum of its proper divisors (12971345).

64856695 is a wasteful number, since it uses less digits than its factorization.

64856695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12971344.

The product of its digits is 1555200, while the sum is 49.

The square root of 64856695 is about 8053.3654455762. The cubic root of 64856695 is about 401.7768763385.

The spelling of 64856695 in words is "sixty-four million, eight hundred fifty-six thousand, six hundred ninety-five".