6465239783 has 4 divisors (see below), whose sum is σ = 6465440688. Its totient is φ = 6465038880.

The previous prime is 6465239777. The next prime is 6465239819. The reversal of 6465239783 is 3879325646.

It is a happy number.

6465239783 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 6465239783 - 2²⁶ = 6398130919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465239773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40091 + ... + 120572.

It is an arithmetic number, because the mean of its divisors is an integer number (1616360172).

Almost surely, 2^6465239783 is an apocalyptic number.

6465239783 is a deficient number, since it is larger than the sum of its proper divisors (200905).

6465239783 is a wasteful number, since it uses less digits than its factorization.

6465239783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200904.

The product of its digits is 6531840, while the sum is 53.

The square root of 6465239783 is about 80406.7147880076. The cubic root of 6465239783 is about 1862.9228895929.

The spelling of 6465239783 in words is "six billion, four hundred sixty-five million, two hundred thirty-nine thousand, seven hundred eighty-three".