26159538749 has 4 divisors (see below), whose sum is σ = 27698335164. Its totient is φ = 24620742336.

The previous prime is 26159538739. The next prime is 26159538761. The reversal of 26159538749 is 94783595162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94783595162 = 2 ⋅47391797581.

It can be written as a sum of positive squares in 2 ways, for example, as 22829094649 + 3330444100 = 151093^2 + 57710^2 .

It is a cyclic number.

It is not a de Polignac number, because 26159538749 - 2⁴ = 26159538733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26159538739) 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, 769398182 + ... + 769398215.

It is an arithmetic number, because the mean of its divisors is an integer number (6924583791).

Almost surely, 2^26159538749 is an apocalyptic number.

It is an amenable number.

26159538749 is a deficient number, since it is larger than the sum of its proper divisors (1538796415).

26159538749 is a wasteful number, since it uses less digits than its factorization.

26159538749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538796414.

The product of its digits is 16329600, while the sum is 59.

The spelling of 26159538749 in words is "twenty-six billion, one hundred fifty-nine million, five hundred thirty-eight thousand, seven hundred forty-nine".