11278769556 has 48 divisors (see below), whose sum is σ = 27177389568. Its totient is φ = 3636796800.

The previous prime is 11278769549. The next prime is 11278769627. The reversal of 11278769556 is 65596787211.

It is a junction number, because it is equal to n+sod(n) for n = 11278769496 and 11278769505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1193506 + ... + 1202918.

It is an arithmetic number, because the mean of its divisors is an integer number (566195616).

Almost surely, 2^11278769556 is an apocalyptic number.

It is an amenable number.

11278769556 is an abundant number, since it is smaller than the sum of its proper divisors (15898620012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11278769556 is a wasteful number, since it uses less digits than its factorization.

11278769556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12672 (or 12670 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 57.

The spelling of 11278769556 in words is "eleven billion, two hundred seventy-eight million, seven hundred sixty-nine thousand, five hundred fifty-six".