64041865 has 4 divisors (see below), whose sum is σ = 76850244. Its totient is φ = 51233488.

The previous prime is 64041853. The next prime is 64041899. The reversal of 64041865 is 56814046.

64041865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56814046 = 2 ⋅28407023.

It can be written as a sum of positive squares in 2 ways, for example, as 6827769 + 57214096 = 2613^2 + 7564^2 .

It is a cyclic number.

It is not a de Polignac number, because 64041865 - 2⁵ = 64041833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64041865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6404182 + ... + 6404191.

It is an arithmetic number, because the mean of its divisors is an integer number (19212561).

Almost surely, 2^64041865 is an apocalyptic number.

It is an amenable number.

64041865 is a deficient number, since it is larger than the sum of its proper divisors (12808379).

64041865 is a wasteful number, since it uses less digits than its factorization.

64041865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12808378.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 64041865 is about 8002.6161347399. The cubic root of 64041865 is about 400.0871997391.

The spelling of 64041865 in words is "sixty-four million, forty-one thousand, eight hundred sixty-five".