26531123613 has 8 divisors (see below), whose sum is σ = 37236664800. Its totient is φ = 16756499088.

The previous prime is 26531123579. The next prime is 26531123617. The reversal of 26531123613 is 31632113562.

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

It is not a de Polignac number, because 26531123613 - 2²⁰ = 26530075037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26531123617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232729098 + ... + 232729211.

It is an arithmetic number, because the mean of its divisors is an integer number (4654583100).

Almost surely, 2^26531123613 is an apocalyptic number.

It is an amenable number.

26531123613 is a deficient number, since it is larger than the sum of its proper divisors (10705541187).

26531123613 is a wasteful number, since it uses less digits than its factorization.

26531123613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465458331.

The product of its digits is 19440, while the sum is 33.

The spelling of 26531123613 in words is "twenty-six billion, five hundred thirty-one million, one hundred twenty-three thousand, six hundred thirteen".