26134187869 has 4 divisors (see below), whose sum is σ = 26184349980. Its totient is φ = 26084025760.

The previous prime is 26134187867. The next prime is 26134187917. The reversal of 26134187869 is 96878143162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96878143162 = 2 ⋅48439071581.

It can be written as a sum of positive squares in 2 ways, for example, as 2805291225 + 23328896644 = 52965^2 + 152738^2 .

It is a cyclic number.

It is not a de Polignac number, because 26134187869 - 2¹ = 26134187867 is a prime.

It is a super-2 number, since 2×26134187869² (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 (26134187867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25080274 + ... + 25081315.

It is an arithmetic number, because the mean of its divisors is an integer number (6546087495).

Almost surely, 2^26134187869 is an apocalyptic number.

It is an amenable number.

26134187869 is a deficient number, since it is larger than the sum of its proper divisors (50162111).

26134187869 is an equidigital number, since it uses as much as digits as its factorization.

26134187869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50162110.

The product of its digits is 3483648, while the sum is 55.

The spelling of 26134187869 in words is "twenty-six billion, one hundred thirty-four million, one hundred eighty-seven thousand, eight hundred sixty-nine".