64791805 has 32 divisors (see below), whose sum is σ = 92010240. Its totient is φ = 43338240.

The previous prime is 64791791. The next prime is 64791809. The reversal of 64791805 is 50819746.

It is a de Polignac number, because none of the positive numbers 2^k-64791805 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64791809) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 27265 + ... + 29545.

It is an arithmetic number, because the mean of its divisors is an integer number (2875320).

Almost surely, 2^64791805 is an apocalyptic number.

64791805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64791805 is a deficient number, since it is larger than the sum of its proper divisors (27218435).

64791805 is a wasteful number, since it uses less digits than its factorization.

64791805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 64791805 is about 8049.3356868750. The cubic root of 64791805 is about 401.6428372274.

The spelling of 64791805 in words is "sixty-four million, seven hundred ninety-one thousand, eight hundred five".