11556661311422 has 16 divisors (see below), whose sum is σ = 17979777604512. Its totient is φ = 5566494607200.

The previous prime is 11556661311359. The next prime is 11556661311479. The reversal of 11556661311422 is 22411316665511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773116778 + ... + 773131725.

It is an arithmetic number, because the mean of its divisors is an integer number (1123736100282).

Almost surely, 2^{11556661311422} is an apocalyptic number.

11556661311422 is a deficient number, since it is larger than the sum of its proper divisors (6423116293090).

11556661311422 is a wasteful number, since it uses less digits than its factorization.

11556661311422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546248643.

The product of its digits is 259200, while the sum is 44.

Adding to 11556661311422 its reverse (22411316665511), we get a palindrome (33967977976933).

The spelling of 11556661311422 in words is "eleven trillion, five hundred fifty-six billion, six hundred sixty-one million, three hundred eleven thousand, four hundred twenty-two".