11993854488 has 128 divisors (see below), whose sum is σ = 37910384640. Its totient is φ = 3071376000.

The previous prime is 11993854487. The next prime is 11993854513. The reversal of 11993854488 is 88445839911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993854487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85503 + ... + 176913.

It is an arithmetic number, because the mean of its divisors is an integer number (296174880).

Almost surely, 2^11993854488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11993854488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18955192320).

11993854488 is an abundant number, since it is smaller than the sum of its proper divisors (25916530152).

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

11993854488 is a wasteful number, since it uses less digits than its factorization.

11993854488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91509 (or 91505 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 60.

The spelling of 11993854488 in words is "eleven billion, nine hundred ninety-three million, eight hundred fifty-four thousand, four hundred eighty-eight".