11899911888 has 120 divisors (see below), whose sum is σ = 35418219200. Its totient is φ = 3719043072.

The previous prime is 11899911871. The next prime is 11899911893. The reversal of 11899911888 is 88811999811.

It is a nude number because it is divisible by every one of its digits.

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, 242973 + ... + 287811.

Almost surely, 2^11899911888 is an apocalyptic number.

11899911888 is a gapful number since it is divisible by the number (18) 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 11899911888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17709109600).

11899911888 is an abundant number, since it is smaller than the sum of its proper divisors (23518307312).

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

11899911888 is a wasteful number, since it uses less digits than its factorization.

11899911888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44969 (or 44960 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 63.

The spelling of 11899911888 in words is "eleven billion, eight hundred ninety-nine million, nine hundred eleven thousand, eight hundred eighty-eight".