11966203855 has 16 divisors (see below), whose sum is σ = 14754684384. Its totient is φ = 9309720960.

The previous prime is 11966203853. The next prime is 11966203877. The reversal of 11966203855 is 55830266911.

It is not a de Polignac number, because 11966203855 - 2¹ = 11966203853 is a prime.

It is a super-2 number, since 2×11966203855² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11966203853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396324 + ... + 425446.

It is an arithmetic number, because the mean of its divisors is an integer number (922167774).

Almost surely, 2^11966203855 is an apocalyptic number.

11966203855 is a deficient number, since it is larger than the sum of its proper divisors (2788480529).

11966203855 is a wasteful number, since it uses less digits than its factorization.

11966203855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31386.

The product of its (nonzero) digits is 388800, while the sum is 46.

It can be divided in two parts, 1196620 and 3855, that added together give a triangular number (1200475 = T₁₅₄₉).

The spelling of 11966203855 in words is "eleven billion, nine hundred sixty-six million, two hundred three thousand, eight hundred fifty-five".