111563781385 has 12 divisors (see below), whose sum is σ = 155733931908. Its totient is φ = 76500878496.

The previous prime is 111563781361. The next prime is 111563781397. The reversal of 111563781385 is 583187365111.

It can be written as a sum of positive squares in 2 ways, for example, as 81263764624 + 30300016761 = 285068^2 + 174069^2 .

It is not a de Polignac number, because 111563781385 - 2⁵ = 111563781353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 227680942 + ... + 227681431.

It is an arithmetic number, because the mean of its divisors is an integer number (12977827659).

Almost surely, 2^111563781385 is an apocalyptic number.

It is an amenable number.

111563781385 is a deficient number, since it is larger than the sum of its proper divisors (44170150523).

111563781385 is an equidigital number, since it uses as much as digits as its factorization.

111563781385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455362392 (or 455362385 counting only the distinct ones).

The product of its digits is 604800, while the sum is 49.

The spelling of 111563781385 in words is "one hundred eleven billion, five hundred sixty-three million, seven hundred eighty-one thousand, three hundred eighty-five".