13440077065 has 16 divisors (see below), whose sum is σ = 16238652048. Its totient is φ = 10678542336.

The previous prime is 13440077059. The next prime is 13440077069. The reversal of 13440077065 is 56077004431.

It can be written as a sum of positive squares in 8 ways, for example, as 6758812944 + 6681264121 = 82212^2 + 81739^2 .

It is a cyclic number.

It is not a de Polignac number, because 13440077065 - 2¹⁷ = 13439945993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13440077069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584119 + ... + 606691.

It is an arithmetic number, because the mean of its divisors is an integer number (1014915753).

Almost surely, 2^13440077065 is an apocalyptic number.

It is an amenable number.

13440077065 is a deficient number, since it is larger than the sum of its proper divisors (2798574983).

13440077065 is a wasteful number, since it uses less digits than its factorization.

13440077065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23388.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 13440077065 in words is "thirteen billion, four hundred forty million, seventy-seven thousand, sixty-five".