11188139956 has 48 divisors (see below), whose sum is σ = 22723448832. Its totient is φ = 4720716000.

The previous prime is 11188139947. The next prime is 11188140023. The reversal of 11188139956 is 65993188111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560981 + ... + 1568131.

It is an arithmetic number, because the mean of its divisors is an integer number (473405184).

Almost surely, 2^11188139956 is an apocalyptic number.

It is an amenable number.

11188139956 is an abundant number, since it is smaller than the sum of its proper divisors (11535308876).

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

11188139956 is a wasteful number, since it uses less digits than its factorization.

11188139956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020 (or 8018 counting only the distinct ones).

The product of its digits is 466560, while the sum is 52.

The spelling of 11188139956 in words is "eleven billion, one hundred eighty-eight million, one hundred thirty-nine thousand, nine hundred fifty-six".