13526291381 has 4 divisors (see below), whose sum is σ = 13572456492. Its totient is φ = 13480126272.

The previous prime is 13526291369. The next prime is 13526291393. The reversal of 13526291381 is 18319262531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18319262531 = 1039 ⋅17631629.

It is an interprime number because it is at equal distance from previous prime (13526291369) and next prime (13526291393).

It can be written as a sum of positive squares in 2 ways, for example, as 10907922481 + 2618368900 = 104441^2 + 51170^2 .

It is a cyclic number.

It is not a de Polignac number, because 13526291381 - 2¹⁴ = 13526274997 is a prime.

It is a super-3 number, since 3×13526291381³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13526291081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23082116 + ... + 23082701.

It is an arithmetic number, because the mean of its divisors is an integer number (3393114123).

Almost surely, 2^13526291381 is an apocalyptic number.

It is an amenable number.

13526291381 is a deficient number, since it is larger than the sum of its proper divisors (46165111).

13526291381 is an equidigital number, since it uses as much as digits as its factorization.

13526291381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46165110.

The product of its digits is 77760, while the sum is 41.

The spelling of 13526291381 in words is "thirteen billion, five hundred twenty-six million, two hundred ninety-one thousand, three hundred eighty-one".