26565414121 has 3 divisors (see below), whose sum is σ = 26565577111. Its totient is φ = 26565251132.

The previous prime is 26565414101. The next prime is 26565414143. The reversal of 26565414121 is 12141456562.

The square root of 26565414121 is 162989.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1443164121 + 25122250000 = 37989^2 + 158500^2 .

It is not a de Polignac number, because 26565414121 - 2¹⁹ = 26564889833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26565414101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81495 + ... + 244483.

Almost surely, 2^26565414121 is an apocalyptic number.

26565414121 is the 162989-th square number.

26565414121 is the 81495-th centered octagonal number.

It is an amenable number.

26565414121 is a deficient number, since it is larger than the sum of its proper divisors (162990).

26565414121 is an frugal number, since it uses more digits than its factorization.

26565414121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325978 (or 162989 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

It can be divided in two parts, 2656541 and 4121, that added together give a palindrome (2660662).

The spelling of 26565414121 in words is "twenty-six billion, five hundred sixty-five million, four hundred fourteen thousand, one hundred twenty-one".