11391140992 has 128 divisors (see below), whose sum is σ = 28355184000. Its totient is φ = 4428349440.

The previous prime is 11391140963. The next prime is 11391141007. The reversal of 11391140992 is 29904119311.

It is a tau number, because it is divible by the number of its divisors (128).

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, 5843634 + ... + 5845582.

It is an arithmetic number, because the mean of its divisors is an integer number (221524875).

Almost surely, 2^11391140992 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 11391140992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14177592000).

11391140992 is an abundant number, since it is smaller than the sum of its proper divisors (16964043008).

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

11391140992 is a wasteful number, since it uses less digits than its factorization.

11391140992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 11391140992 in words is "eleven billion, three hundred ninety-one million, one hundred forty thousand, nine hundred ninety-two".