64406365 has 4 divisors (see below), whose sum is σ = 77287644. Its totient is φ = 51525088.

The previous prime is 64406359. The next prime is 64406369. The reversal of 64406365 is 56360446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36072036 + 28334329 = 6006^2 + 5323^2 .

It is a cyclic number.

It is not a de Polignac number, because 64406365 - 2⁹ = 64405853 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 64406365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64406369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6440632 + ... + 6440641.

It is an arithmetic number, because the mean of its divisors is an integer number (19321911).

Almost surely, 2^64406365 is an apocalyptic number.

It is an amenable number.

64406365 is a deficient number, since it is larger than the sum of its proper divisors (12881279).

64406365 is a wasteful number, since it uses less digits than its factorization.

64406365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12881278.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 64406365 is about 8025.3576244302. The cubic root of 64406365 is about 400.8448082415.

The spelling of 64406365 in words is "sixty-four million, four hundred six thousand, three hundred sixty-five".