64497705 has 16 divisors (see below), whose sum is σ = 103735680. Its totient is φ = 34219008.

The previous prime is 64497659. The next prime is 64497707. The reversal of 64497705 is 50779446.

It is not a de Polignac number, because 64497705 - 2¹⁶ = 64432169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64497707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8245 + ... + 14034.

It is an arithmetic number, because the mean of its divisors is an integer number (6483480).

Almost surely, 2^64497705 is an apocalyptic number.

It is an amenable number.

64497705 is a deficient number, since it is larger than the sum of its proper divisors (39237975).

64497705 is a wasteful number, since it uses less digits than its factorization.

64497705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22480.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 64497705 is about 8031.0463203745. The cubic root of 64497705 is about 401.0342091408.

The spelling of 64497705 in words is "sixty-four million, four hundred ninety-seven thousand, seven hundred five".