26436743789 has 12 divisors (see below), whose sum is σ = 28310217852. Its totient is φ = 24670536000.

The previous prime is 26436743783. The next prime is 26436743791. The reversal of 26436743789 is 98734763462.

It can be written as a sum of positive squares in 2 ways, for example, as 5133006025 + 21303737764 = 71645^2 + 145958^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26436743789 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 (26436743783) 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 11 ways as a sum of consecutive naturals, for example, 587762 + ... + 631139.

It is an arithmetic number, because the mean of its divisors is an integer number (2359184821).

Almost surely, 2^26436743789 is an apocalyptic number.

It is an amenable number.

26436743789 is a deficient number, since it is larger than the sum of its proper divisors (1873474063).

26436743789 is a wasteful number, since it uses less digits than its factorization.

26436743789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218988 (or 1218965 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 59.

The spelling of 26436743789 in words is "twenty-six billion, four hundred thirty-six million, seven hundred forty-three thousand, seven hundred eighty-nine".