26530245121 has 4 divisors (see below), whose sum is σ = 26699227732. Its totient is φ = 26361262512.

The previous prime is 26530245113. The next prime is 26530245127. The reversal of 26530245121 is 12154203562.

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 2917620225 + 23612624896 = 54015^2 + 153664^2 .

It is a cyclic number.

It is not a de Polignac number, because 26530245121 - 2³ = 26530245113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26530245127) 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, 84491070 + ... + 84491383.

It is an arithmetic number, because the mean of its divisors is an integer number (6674806933).

Almost surely, 2^26530245121 is an apocalyptic number.

It is an amenable number.

26530245121 is a deficient number, since it is larger than the sum of its proper divisors (168982611).

26530245121 is a wasteful number, since it uses less digits than its factorization.

26530245121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168982610.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 26530245121 its reverse (12154203562), we get a palindrome (38684448683).

The spelling of 26530245121 in words is "twenty-six billion, five hundred thirty million, two hundred forty-five thousand, one hundred twenty-one".