1113988047991 has 48 divisors (see below), whose sum is σ = 1407505096704. Its totient is φ = 873853396416.

The previous prime is 1113988047983. The next prime is 1113988048003. The reversal of 1113988047991 is 1997408893111.

It is not a de Polignac number, because 1113988047991 - 2³ = 1113988047983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113988047901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144239056 + ... + 144246778.

It is an arithmetic number, because the mean of its divisors is an integer number (29323022848).

Almost surely, 2^{1113988047991} is an apocalyptic number.

1113988047991 is a deficient number, since it is larger than the sum of its proper divisors (293517048713).

1113988047991 is a wasteful number, since it uses less digits than its factorization.

1113988047991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9660 (or 9653 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 61.

The spelling of 1113988047991 in words is "one trillion, one hundred thirteen billion, nine hundred eighty-eight million, forty-seven thousand, nine hundred ninety-one".