64845094609 has 3 divisors (see below), whose sum is σ = 64845349257. Its totient is φ = 64844839962.

The previous prime is 64845094607. The next prime is 64845094619. The reversal of 64845094609 is 90649054846.

The square root of 64845094609 is 254647.

It is a perfect power (a square), and thus also a powerful number.

64845094609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 64845094609 - 2¹ = 64845094607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64845094609.

It is not an unprimeable number, because it can be changed into a prime (64845094607) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 127324 + ... + 381970.

It is an arithmetic number, because the mean of its divisors is an integer number (21615116419).

Almost surely, 2^64845094609 is an apocalyptic number.

64845094609 is the 254647-th square number.

64845094609 is the 127324-th centered octagonal number.

It is an amenable number.

64845094609 is a deficient number, since it is larger than the sum of its proper divisors (254648).

64845094609 is an frugal number, since it uses more digits than its factorization.

64845094609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509294 (or 254647 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 64845094609 in words is "sixty-four billion, eight hundred forty-five million, ninety-four thousand, six hundred nine".