5264440639 has 4 divisors (see below), whose sum is σ = 5264823256. Its totient is φ = 5264058024.

The previous prime is 5264440619. The next prime is 5264440651. The reversal of 5264440639 is 9360444625.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5264440639 - 2⁵ = 5264440607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5264440595 and 5264440604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5264440619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169869 + ... + 198454.

It is an arithmetic number, because the mean of its divisors is an integer number (1316205814).

Almost surely, 2^5264440639 is an apocalyptic number.

5264440639 is a deficient number, since it is larger than the sum of its proper divisors (382617).

5264440639 is a wasteful number, since it uses less digits than its factorization.

5264440639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382616.

The product of its (nonzero) digits is 622080, while the sum is 43.

The square root of 5264440639 is about 72556.4651771295. The cubic root of 5264440639 is about 1739.6053888904.

The spelling of 5264440639 in words is "five billion, two hundred sixty-four million, four hundred forty thousand, six hundred thirty-nine".