64040365 has 8 divisors (see below), whose sum is σ = 76893048. Its totient is φ = 51202560.

The previous prime is 64040359. The next prime is 64040477. The reversal of 64040365 is 56304046.

It can be written as a sum of positive squares in 4 ways, for example, as 25140196 + 38900169 = 5014^2 + 6237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64040365 - 2³ = 64040357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11205 + ... + 15925.

It is an arithmetic number, because the mean of its divisors is an integer number (9611631).

Almost surely, 2^64040365 is an apocalyptic number.

It is an amenable number.

64040365 is a deficient number, since it is larger than the sum of its proper divisors (12852683).

64040365 is a wasteful number, since it uses less digits than its factorization.

64040365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7439.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 64040365 is about 8002.5224148390. The cubic root of 64040365 is about 400.0840760768.

The spelling of 64040365 in words is "sixty-four million, forty thousand, three hundred sixty-five".