64405345 has 32 divisors (see below), whose sum is σ = 85034880. Its totient is φ = 46656000.

The previous prime is 64405343. The next prime is 64405349. The reversal of 64405345 is 54350446.

It is not a de Polignac number, because 64405345 - 2¹ = 64405343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64405343) 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, 256470 + ... + 256720.

It is an arithmetic number, because the mean of its divisors is an integer number (2657340).

Almost surely, 2^64405345 is an apocalyptic number.

It is an amenable number.

64405345 is a deficient number, since it is larger than the sum of its proper divisors (20629535).

64405345 is a wasteful number, since it uses less digits than its factorization.

64405345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 64405345 is about 8025.2940756087. The cubic root of 64405345 is about 400.8426921780.

The spelling of 64405345 in words is "sixty-four million, four hundred five thousand, three hundred forty-five".