64805823 has 12 divisors (see below), whose sum is σ = 94891680. Its totient is φ = 42611616.

The previous prime is 64805813. The next prime is 64805837. The reversal of 64805823 is 32850846.

64805823 is a `hidden beast` number, since 648 + 0 + 5 + 8 + 2 + 3 = 666.

It is not a de Polignac number, because 64805823 - 2⁹ = 64805311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64805813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48663 + ... + 49976.

It is an arithmetic number, because the mean of its divisors is an integer number (7907640).

Almost surely, 2^64805823 is an apocalyptic number.

64805823 is a deficient number, since it is larger than the sum of its proper divisors (30085857).

64805823 is a wasteful number, since it uses less digits than its factorization.

64805823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98718 (or 98715 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 64805823 is about 8050.2063948696. The cubic root of 64805823 is about 401.6718008867.

The spelling of 64805823 in words is "sixty-four million, eight hundred five thousand, eight hundred twenty-three".