64595945 has 4 divisors (see below), whose sum is σ = 77515140. Its totient is φ = 51676752.

The previous prime is 64595939. The next prime is 64595957. The reversal of 64595945 is 54959546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54959546 = 2 ⋅27479773.

It can be written as a sum of positive squares in 2 ways, for example, as 20187049 + 44408896 = 4493^2 + 6664^2 .

It is a cyclic number.

It is not a de Polignac number, because 64595945 - 2⁴ = 64595929 is a prime.

It is a super-2 number, since 2×64595945² = 8345272220886050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64595945.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6459590 + ... + 6459599.

It is an arithmetic number, because the mean of its divisors is an integer number (19378785).

Almost surely, 2^64595945 is an apocalyptic number.

It is an amenable number.

64595945 is a deficient number, since it is larger than the sum of its proper divisors (12919195).

64595945 is a wasteful number, since it uses less digits than its factorization.

64595945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12919194.

The product of its digits is 972000, while the sum is 47.

The square root of 64595945 is about 8037.1602572053. The cubic root of 64595945 is about 401.2377182668.

The spelling of 64595945 in words is "sixty-four million, five hundred ninety-five thousand, nine hundred forty-five".