1108987731591 has 16 divisors (see below), whose sum is σ = 1481059987200. Its totient is φ = 738120509568.

The previous prime is 1108987731581. The next prime is 1108987731613. The reversal of 1108987731591 is 1951377898011.

It is not a de Polignac number, because 1108987731591 - 2³⁵ = 1074627993223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1108987731581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42939480 + ... + 42965298.

It is an arithmetic number, because the mean of its divisors is an integer number (92566249200).

Almost surely, 2^{1108987731591} is an apocalyptic number.

1108987731591 is a deficient number, since it is larger than the sum of its proper divisors (372072255609).

1108987731591 is a wasteful number, since it uses less digits than its factorization.

1108987731591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48598.

The product of its (nonzero) digits is 3810240, while the sum is 60.

The spelling of 1108987731591 in words is "one trillion, one hundred eight billion, nine hundred eighty-seven million, seven hundred thirty-one thousand, five hundred ninety-one".