64815065 has 8 divisors (see below), whose sum is σ = 88889280. Its totient is φ = 44444592.

The previous prime is 64815059. The next prime is 64815103. The reversal of 64815065 is 56051846.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64815065 - 2¹⁰ = 64814041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 1851859 = 64815065 / (6 + 4 + 8 + 1 + 5 + 0 + 6 + 5).

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, 925895 + ... + 925964.

It is an arithmetic number, because the mean of its divisors is an integer number (11111160).

Almost surely, 2^64815065 is an apocalyptic number.

It is an amenable number.

64815065 is a deficient number, since it is larger than the sum of its proper divisors (24074215).

64815065 is a wasteful number, since it uses less digits than its factorization.

64815065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851871.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 64815065 is about 8050.7803969553. The cubic root of 64815065 is about 401.6908942035.

The spelling of 64815065 in words is "sixty-four million, eight hundred fifteen thousand, sixty-five".