26613404137 has 4 divisors (see below), whose sum is σ = 28178898516. Its totient is φ = 25047909760.

The previous prime is 26613404123. The next prime is 26613404143. The reversal of 26613404137 is 73140431662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73140431662 = 2 ⋅36570215831.

It can be written as a sum of positive squares in 2 ways, for example, as 12160796176 + 14452607961 = 110276^2 + 120219^2 .

It is a cyclic number.

It is not a de Polignac number, because 26613404137 - 2⁷ = 26613404009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26613404096 and 26613404105.

It is not an unprimeable number, because it can be changed into a prime (26613404537) 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, 782747164 + ... + 782747197.

It is an arithmetic number, because the mean of its divisors is an integer number (7044724629).

Almost surely, 2^26613404137 is an apocalyptic number.

It is an amenable number.

26613404137 is a deficient number, since it is larger than the sum of its proper divisors (1565494379).

26613404137 is a wasteful number, since it uses less digits than its factorization.

26613404137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565494378.

The product of its (nonzero) digits is 72576, while the sum is 37.

Adding to 26613404137 its reverse (73140431662), we get a palindrome (99753835799).

The spelling of 26613404137 in words is "twenty-six billion, six hundred thirteen million, four hundred four thousand, one hundred thirty-seven".