13642726873 has 4 divisors (see below), whose sum is σ = 13900136868. Its totient is φ = 13385316880.

The previous prime is 13642726861. The next prime is 13642726907. The reversal of 13642726873 is 37862724631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37862724631 = 67 ⋅565115293.

It can be written as a sum of positive squares in 2 ways, for example, as 5776456009 + 7866270864 = 76003^2 + 88692^2 .

It is a cyclic number.

It is not a de Polignac number, because 13642726873 - 2⁵ = 13642726841 is a prime.

It is a super-2 number, since 2×13642726873² (a number of 21 digits) contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (13642726673) 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, 128704918 + ... + 128705023.

It is an arithmetic number, because the mean of its divisors is an integer number (3475034217).

Almost surely, 2^13642726873 is an apocalyptic number.

It is an amenable number.

13642726873 is a deficient number, since it is larger than the sum of its proper divisors (257409995).

13642726873 is an equidigital number, since it uses as much as digits as its factorization.

13642726873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257409994.

The product of its digits is 2032128, while the sum is 49.

The spelling of 13642726873 in words is "thirteen billion, six hundred forty-two million, seven hundred twenty-six thousand, eight hundred seventy-three".