11511961773 has 12 divisors (see below), whose sum is σ = 16620821280. Its totient is φ = 7084283856.

The previous prime is 11511961759. The next prime is 11511961787. The reversal of 11511961773 is 37716911511.

11511961773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11511961759) and next prime (11511961787).

It is not a de Polignac number, because 11511961773 - 2⁶ = 11511961709 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 (11511961733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11352513 + ... + 11353526.

It is an arithmetic number, because the mean of its divisors is an integer number (1385068440).

Almost surely, 2^11511961773 is an apocalyptic number.

11511961773 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11511961773 is a deficient number, since it is larger than the sum of its proper divisors (5108859507).

11511961773 is a wasteful number, since it uses less digits than its factorization.

11511961773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22706068 (or 22706055 counting only the distinct ones).

The product of its digits is 39690, while the sum is 42.

The spelling of 11511961773 in words is "eleven billion, five hundred eleven million, nine hundred sixty-one thousand, seven hundred seventy-three".