26705243137 has 8 divisors (see below), whose sum is σ = 27693671400. Its totient is φ = 25721318784.

The previous prime is 26705243129. The next prime is 26705243153. The reversal of 26705243137 is 73134250762.

It can be written as a sum of positive squares in 4 ways, for example, as 4238530816 + 22466712321 = 65104^2 + 149889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26705243137 - 2³ = 26705243129 is a prime.

It is a super-2 number, since 2×26705243137² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26705243137.

It is not an unprimeable number, because it can be changed into a prime (26705243737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113898 + ... + 1137619.

It is an arithmetic number, because the mean of its divisors is an integer number (3461708925).

Almost surely, 2^26705243137 is an apocalyptic number.

It is an amenable number.

26705243137 is a deficient number, since it is larger than the sum of its proper divisors (988428263).

26705243137 is a wasteful number, since it uses less digits than its factorization.

26705243137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251955.

The product of its (nonzero) digits is 211680, while the sum is 40.

Adding to 26705243137 its reverse (73134250762), we get a palindrome (99839493899).

The spelling of 26705243137 in words is "twenty-six billion, seven hundred five million, two hundred forty-three thousand, one hundred thirty-seven".