64909065 has 32 divisors (see below), whose sum is σ = 112766976. Its totient is φ = 31691520.

The previous prime is 64909051. The next prime is 64909067. The reversal of 64909065 is 56090946.

It is not a de Polignac number, because 64909065 - 2⁴ = 64909049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64909067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23455 + ... + 26075.

It is an arithmetic number, because the mean of its divisors is an integer number (3523968).

Almost surely, 2^64909065 is an apocalyptic number.

64909065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64909065 is a deficient number, since it is larger than the sum of its proper divisors (47857911).

64909065 is a wasteful number, since it uses less digits than its factorization.

64909065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 64909065 is about 8056.6162251903. The cubic root of 64909065 is about 401.8849885089.

The spelling of 64909065 in words is "sixty-four million, nine hundred nine thousand, sixty-five".