26815326913 has 8 divisors (see below), whose sum is σ = 27009959400. Its totient is φ = 26620890240.

The previous prime is 26815326877. The next prime is 26815326929. The reversal of 26815326913 is 31962351862.

It can be written as a sum of positive squares in 4 ways, for example, as 7720785424 + 19094541489 = 87868^2 + 138183^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26815326913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26815326973) 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, 231733 + ... + 327613.

It is an arithmetic number, because the mean of its divisors is an integer number (3376244925).

Almost surely, 2^26815326913 is an apocalyptic number.

It is an amenable number.

26815326913 is a deficient number, since it is larger than the sum of its proper divisors (194632487).

26815326913 is a wasteful number, since it uses less digits than its factorization.

26815326913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97907.

The product of its digits is 466560, while the sum is 46.

The spelling of 26815326913 in words is "twenty-six billion, eight hundred fifteen million, three hundred twenty-six thousand, nine hundred thirteen".