26556340137 has 4 divisors (see below), whose sum is σ = 35408453520. Its totient is φ = 17704226756.

The previous prime is 26556340127. The next prime is 26556340157. The reversal of 26556340137 is 73104365562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26556340137 - 2⁶ = 26556340073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26556340117) 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, 4426056687 + ... + 4426056692.

It is an arithmetic number, because the mean of its divisors is an integer number (8852113380).

Almost surely, 2^26556340137 is an apocalyptic number.

It is an amenable number.

26556340137 is a deficient number, since it is larger than the sum of its proper divisors (8852113383).

26556340137 is an equidigital number, since it uses as much as digits as its factorization.

26556340137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8852113382.

The product of its (nonzero) digits is 453600, while the sum is 42.

The spelling of 26556340137 in words is "twenty-six billion, five hundred fifty-six million, three hundred forty thousand, one hundred thirty-seven".