261114401813 has 2 divisors, whose sum is σ = 261114401814. Its totient is φ = 261114401812.

The previous prime is 261114401719. The next prime is 261114401887. The reversal of 261114401813 is 318104411162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218404806244 + 42709595569 = 467338^2 + 206663^2 .

It is a cyclic number.

It is not a de Polignac number, because 261114401813 - 2²⁶ = 261047292949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261114401813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261114401113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130557200906 + 130557200907.

It is an arithmetic number, because the mean of its divisors is an integer number (130557200907).

Almost surely, 2^261114401813 is an apocalyptic number.

It is an amenable number.

261114401813 is a deficient number, since it is larger than the sum of its proper divisors (1).

261114401813 is an equidigital number, since it uses as much as digits as its factorization.

261114401813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

Adding to 261114401813 its reverse (318104411162), we get a palindrome (579218812975).

The spelling of 261114401813 in words is "two hundred sixty-one billion, one hundred fourteen million, four hundred one thousand, eight hundred thirteen".