26061616061 has 4 divisors (see below), whose sum is σ = 28066355772. Its totient is φ = 24056876352.

The previous prime is 26061616051. The next prime is 26061616073. The reversal of 26061616061 is 16061616062.

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 3589807225 + 22471808836 = 59915^2 + 149906^2 .

It is a cyclic number.

It is not a de Polignac number, because 26061616061 - 2¹⁰ = 26061615037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26061616051) 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, 1002369836 + ... + 1002369861.

It is an arithmetic number, because the mean of its divisors is an integer number (7016588943).

Almost surely, 2^26061616061 is an apocalyptic number.

It is an amenable number.

26061616061 is a deficient number, since it is larger than the sum of its proper divisors (2004739711).

26061616061 is a wasteful number, since it uses less digits than its factorization.

26061616061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004739710.

The product of its (nonzero) digits is 15552, while the sum is 35.

Subtracting from 26061616061 its reverse (16061616062), we obtain a palindrome (9999999999).

The spelling of 26061616061 in words is "twenty-six billion, sixty-one million, six hundred sixteen thousand, sixty-one".