11123457912 has 96 divisors (see below), whose sum is σ = 34501209600. Its totient is φ = 3171534912.

The previous prime is 11123457887. The next prime is 11123457929. The reversal of 11123457912 is 21975432111.

It is a happy number.

11123457912 is a `hidden beast` number, since 1 + 112 + 3 + 457 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222789 + ... + 268107.

It is an arithmetic number, because the mean of its divisors is an integer number (359387600).

Almost surely, 2^11123457912 is an apocalyptic number.

11123457912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11123457912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17250604800).

11123457912 is an abundant number, since it is smaller than the sum of its proper divisors (23377751688).

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

11123457912 is a wasteful number, since it uses less digits than its factorization.

11123457912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45825 (or 45818 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The spelling of 11123457912 in words is "eleven billion, one hundred twenty-three million, four hundred fifty-seven thousand, nine hundred twelve".