11369651861 has 2 divisors, whose sum is σ = 11369651862. Its totient is φ = 11369651860.

The previous prime is 11369651857. The next prime is 11369651873. The reversal of 11369651861 is 16815696311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9810902500 + 1558749361 = 99050^2 + 39481^2 .

It is a cyclic number.

It is not a de Polignac number, because 11369651861 - 2² = 11369651857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11369654861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5684825930 + 5684825931.

It is an arithmetic number, because the mean of its divisors is an integer number (5684825931).

Almost surely, 2^11369651861 is an apocalyptic number.

It is an amenable number.

11369651861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11369651861 is an equidigital number, since it uses as much as digits as its factorization.

11369651861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 47.

The spelling of 11369651861 in words is "eleven billion, three hundred sixty-nine million, six hundred fifty-one thousand, eight hundred sixty-one".