64251365 has 4 divisors (see below), whose sum is σ = 77101644. Its totient is φ = 51401088.

The previous prime is 64251349. The next prime is 64251367. The reversal of 64251365 is 56315246.

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 36699364 + 27552001 = 6058^2 + 5249^2 .

It is a cyclic number.

It is not a de Polignac number, because 64251365 - 2⁴ = 64251349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64251367) 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, 6425132 + ... + 6425141.

It is an arithmetic number, because the mean of its divisors is an integer number (19275411).

Almost surely, 2^64251365 is an apocalyptic number.

It is an amenable number.

64251365 is a deficient number, since it is larger than the sum of its proper divisors (12850279).

64251365 is a wasteful number, since it uses less digits than its factorization.

64251365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12850278.

The product of its digits is 21600, while the sum is 32.

The square root of 64251365 is about 8015.6949168491. The cubic root of 64251365 is about 400.5229929812.

The spelling of 64251365 in words is "sixty-four million, two hundred fifty-one thousand, three hundred sixty-five".