64288765 has 8 divisors (see below), whose sum is σ = 77189688. Its totient is φ = 51402240.

The previous prime is 64288753. The next prime is 64288769. The reversal of 64288765 is 56788246.

It can be written as a sum of positive squares in 4 ways, for example, as 22982436 + 41306329 = 4794^2 + 6427^2 .

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

It is not a de Polignac number, because 64288765 - 2⁵ = 64288733 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 (64288769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14625 + ... + 18505.

It is an arithmetic number, because the mean of its divisors is an integer number (9648711).

Almost surely, 2^64288765 is an apocalyptic number.

It is an amenable number.

64288765 is a deficient number, since it is larger than the sum of its proper divisors (12900923).

64288765 is a wasteful number, since it uses less digits than its factorization.

64288765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7199.

The product of its digits is 645120, while the sum is 46.

The square root of 64288765 is about 8018.0275005764. The cubic root of 64288765 is about 400.6006912236.

The spelling of 64288765 in words is "sixty-four million, two hundred eighty-eight thousand, seven hundred sixty-five".