111159947787 has 24 divisors (see below), whose sum is σ = 172429798032. Its totient is φ = 63513172800.

The previous prime is 111159947783. The next prime is 111159947791. The reversal of 111159947787 is 787749951111.

It is an interprime number because it is at equal distance from previous prime (111159947783) and next prime (111159947791).

It is not a de Polignac number, because 111159947787 - 2² = 111159947783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111159947787.

It is not an unprimeable number, because it can be changed into a prime (111159947783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1549737 + ... + 1619877.

It is an arithmetic number, because the mean of its divisors is an integer number (7184574918).

Almost surely, 2^111159947787 is an apocalyptic number.

111159947787 is a deficient number, since it is larger than the sum of its proper divisors (61269850245).

111159947787 is a wasteful number, since it uses less digits than its factorization.

111159947787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80939 (or 80932 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 60.

The spelling of 111159947787 in words is "one hundred eleven billion, one hundred fifty-nine million, nine hundred forty-seven thousand, seven hundred eighty-seven".