26931529193215 has 4 divisors (see below), whose sum is σ = 32317835031864. Its totient is φ = 21545223354568.

The previous prime is 26931529193213. The next prime is 26931529193227. The reversal of 26931529193215 is 51239192513962.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26931529193215 - 2¹ = 26931529193213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26931529193215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26931529193213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2693152919317 + ... + 2693152919326.

It is an arithmetic number, because the mean of its divisors is an integer number (8079458757966).

Almost surely, 2^{26931529193215} is an apocalyptic number.

26931529193215 is a deficient number, since it is larger than the sum of its proper divisors (5386305838649).

26931529193215 is an equidigital number, since it uses as much as digits as its factorization.

26931529193215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386305838648.

The product of its digits is 7873200, while the sum is 58.

The spelling of 26931529193215 in words is "twenty-six trillion, nine hundred thirty-one billion, five hundred twenty-nine million, one hundred ninety-three thousand, two hundred fifteen".