5439009865 has 4 divisors (see below), whose sum is σ = 6526811844. Its totient is φ = 4351207888.

The previous prime is 5439009853. The next prime is 5439009941. The reversal of 5439009865 is 5689009345.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1936264009 + 3502745856 = 44003^2 + 59184^2 .

It is a cyclic number.

It is not a de Polignac number, because 5439009865 - 2⁵ = 5439009833 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543900982 + ... + 543900991.

It is an arithmetic number, because the mean of its divisors is an integer number (1631702961).

Almost surely, 2^5439009865 is an apocalyptic number.

It is an amenable number.

5439009865 is a deficient number, since it is larger than the sum of its proper divisors (1087801979).

5439009865 is a wasteful number, since it uses less digits than its factorization.

5439009865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087801978.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The square root of 5439009865 is about 73749.6431516790. The cubic root of 5439009865 is about 1758.6251600618.

The spelling of 5439009865 in words is "five billion, four hundred thirty-nine million, nine thousand, eight hundred sixty-five".