64318765 has 16 divisors (see below), whose sum is σ = 90594432. Its totient is φ = 42911424.

The previous prime is 64318757. The next prime is 64318783. The reversal of 64318765 is 56781346.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64318765 - 2³ = 64318757 is a prime.

It is a super-2 number, since 2×64318765² = 8273807062250450, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 23539 + ... + 26128.

It is an arithmetic number, because the mean of its divisors is an integer number (5662152).

Almost surely, 2^64318765 is an apocalyptic number.

It is an amenable number.

64318765 is a deficient number, since it is larger than the sum of its proper divisors (26275667).

64318765 is a wasteful number, since it uses less digits than its factorization.

64318765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49716.

The product of its digits is 120960, while the sum is 40.

The square root of 64318765 is about 8019.8980666839. The cubic root of 64318765 is about 400.6629942395.

The spelling of 64318765 in words is "sixty-four million, three hundred eighteen thousand, seven hundred sixty-five".