64439565 has 8 divisors (see below), whose sum is σ = 103103328. Its totient is φ = 34367760.

The previous prime is 64439563. The next prime is 64439569. The reversal of 64439565 is 56593446.

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

It is not a de Polignac number, because 64439565 - 2¹ = 64439563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64439561) 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, 2147971 + ... + 2148000.

It is an arithmetic number, because the mean of its divisors is an integer number (12887916).

Almost surely, 2^64439565 is an apocalyptic number.

It is an amenable number.

64439565 is a deficient number, since it is larger than the sum of its proper divisors (38663763).

64439565 is a wasteful number, since it uses less digits than its factorization.

64439565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295979.

The product of its digits is 388800, while the sum is 42.

The square root of 64439565 is about 8027.4258015880. The cubic root of 64439565 is about 400.9136718371.

The spelling of 64439565 in words is "sixty-four million, four hundred thirty-nine thousand, five hundred sixty-five".