26275661537 has 4 divisors (see below), whose sum is σ = 26635602180. Its totient is φ = 25915720896.

The previous prime is 26275661509. The next prime is 26275661543. The reversal of 26275661537 is 73516657262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11917870561 + 14357790976 = 109169^2 + 119824^2 .

It is a cyclic number.

It is not a de Polignac number, because 26275661537 - 2²⁰ = 26274612961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26275661557) 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 3 ways as a sum of consecutive naturals, for example, 179970212 + ... + 179970357.

It is an arithmetic number, because the mean of its divisors is an integer number (6658900545).

Almost surely, 2^26275661537 is an apocalyptic number.

It is an amenable number.

26275661537 is a deficient number, since it is larger than the sum of its proper divisors (359940643).

26275661537 is an equidigital number, since it uses as much as digits as its factorization.

26275661537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359940642.

The product of its digits is 3175200, while the sum is 50.

The spelling of 26275661537 in words is "twenty-six billion, two hundred seventy-five million, six hundred sixty-one thousand, five hundred thirty-seven".