11881618856 has 16 divisors (see below), whose sum is σ = 22393468500. Its totient is φ = 5910027264.

The previous prime is 11881618841. The next prime is 11881618871. The reversal of 11881618856 is 65881618811.

It is an interprime number because it is at equal distance from previous prime (11881618841) and next prime (11881618871).

It can be written as a sum of positive squares in 2 ways, for example, as 10801444900 + 1080173956 = 103930^2 + 32866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11881618798 and 11881618807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3846131 + ... + 3849218.

Almost surely, 2^11881618856 is an apocalyptic number.

It is an amenable number.

11881618856 is a deficient number, since it is larger than the sum of its proper divisors (10511849644).

11881618856 is a wasteful number, since it uses less digits than its factorization.

11881618856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7695548 (or 7695544 counting only the distinct ones).

The product of its digits is 737280, while the sum is 53.

The spelling of 11881618856 in words is "eleven billion, eight hundred eighty-one million, six hundred eighteen thousand, eight hundred fifty-six".