64805855 has 8 divisors (see below), whose sum is σ = 78108000. Its totient is φ = 51617376.

The previous prime is 64805843. The next prime is 64805857. The reversal of 64805855 is 55850846.

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

It is a cyclic number.

It is not a de Polignac number, because 64805855 - 2²⁰ = 63757279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64805857) 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, 27155 + ... + 29444.

It is an arithmetic number, because the mean of its divisors is an integer number (9763500).

Almost surely, 2^64805855 is an apocalyptic number.

64805855 is a deficient number, since it is larger than the sum of its proper divisors (13302145).

64805855 is a wasteful number, since it uses less digits than its factorization.

64805855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56833.

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 64805855 is about 8050.2083823961. The cubic root of 64805855 is about 401.6718669995.

The spelling of 64805855 in words is "sixty-four million, eight hundred five thousand, eight hundred fifty-five".