13648703765 has 4 divisors (see below), whose sum is σ = 16378444524. Its totient is φ = 10918963008.

The previous prime is 13648703737. The next prime is 13648703767. The reversal of 13648703765 is 56730784631.

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 9843417796 + 3805285969 = 99214^2 + 61687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13648703765 is a prime.

It is a super-2 number, since 2×13648703765² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13648703767) 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, 1364870372 + ... + 1364870381.

It is an arithmetic number, because the mean of its divisors is an integer number (4094611131).

Almost surely, 2^13648703765 is an apocalyptic number.

It is an amenable number.

13648703765 is a deficient number, since it is larger than the sum of its proper divisors (2729740759).

13648703765 is an equidigital number, since it uses as much as digits as its factorization.

13648703765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729740758.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 13648703765 in words is "thirteen billion, six hundred forty-eight million, seven hundred three thousand, seven hundred sixty-five".