11803812856 has 32 divisors (see below), whose sum is σ = 24369828480. Its totient is φ = 5315221600.

The previous prime is 11803812847. The next prime is 11803812857. The reversal of 11803812856 is 65821830811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11803812857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617380 + ... + 636211.

It is an arithmetic number, because the mean of its divisors is an integer number (761557140).

Almost surely, 2^11803812856 is an apocalyptic number.

It is an amenable number.

11803812856 is an abundant number, since it is smaller than the sum of its proper divisors (12566015624).

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

11803812856 is a wasteful number, since it uses less digits than its factorization.

11803812856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253715 (or 1253711 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 11803812856 in words is "eleven billion, eight hundred three million, eight hundred twelve thousand, eight hundred fifty-six".