26513318181 has 32 divisors (see below), whose sum is σ = 42538624000. Its totient is φ = 14349363840.

The previous prime is 26513318141. The next prime is 26513318203. The reversal of 26513318181 is 18181331562.

It is not a de Polignac number, because 26513318181 - 2¹⁴ = 26513301797 is a prime.

It is a super-2 number, since 2×26513318181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26513318141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2340870 + ... + 2352168.

It is an arithmetic number, because the mean of its divisors is an integer number (1329332000).

Almost surely, 2^26513318181 is an apocalyptic number.

26513318181 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26513318181 is a deficient number, since it is larger than the sum of its proper divisors (16025305819).

26513318181 is a wasteful number, since it uses less digits than its factorization.

26513318181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17209.

The product of its digits is 34560, while the sum is 39.

The spelling of 26513318181 in words is "twenty-six billion, five hundred thirteen million, three hundred eighteen thousand, one hundred eighty-one".