11256826820 has 24 divisors (see below), whose sum is σ = 23674489944. Its totient is φ = 4496034816.

The previous prime is 11256826813. The next prime is 11256826859. The reversal of 11256826820 is 2862865211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1699418176 + 9557408644 = 41224^2 + 97762^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404699 + ... + 431618.

It is an arithmetic number, because the mean of its divisors is an integer number (986437081).

Almost surely, 2^11256826820 is an apocalyptic number.

11256826820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11256826820 is an abundant number, since it is smaller than the sum of its proper divisors (12417663124).

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

11256826820 is a wasteful number, since it uses less digits than its factorization.

11256826820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836999 (or 836997 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 11256826820 in words is "eleven billion, two hundred fifty-six million, eight hundred twenty-six thousand, eight hundred twenty".