16238610065 has 8 divisors (see below), whose sum is σ = 19487889960. Its totient is φ = 12989849472.

The previous prime is 16238610043. The next prime is 16238610067. The reversal of 16238610065 is 56001683261.

It can be written as a sum of positive squares in 4 ways, for example, as 6924236944 + 9314373121 = 83212^2 + 96511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16238610065 - 2²⁸ = 15970174609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16238610067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57350 + ... + 189119.

It is an arithmetic number, because the mean of its divisors is an integer number (2435986245).

Almost surely, 2^16238610065 is an apocalyptic number.

It is an amenable number.

16238610065 is a deficient number, since it is larger than the sum of its proper divisors (3249279895).

16238610065 is a wasteful number, since it uses less digits than its factorization.

16238610065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259651.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 16238610065 in words is "sixteen billion, two hundred thirty-eight million, six hundred ten thousand, sixty-five".