111563643 has 8 divisors (see below), whose sum is σ = 150971968. Its totient is φ = 73265544.

The previous prime is 111563597. The next prime is 111563651. The reversal of 111563643 is 346365111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111563643 - 2⁹ = 111563131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111563643.

It is not an unprimeable number, because it can be changed into a prime (111563143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277321 + ... + 277722.

It is an arithmetic number, because the mean of its divisors is an integer number (18871496).

Almost surely, 2^111563643 is an apocalyptic number.

111563643 is a deficient number, since it is larger than the sum of its proper divisors (39408325).

111563643 is an equidigital number, since it uses as much as digits as its factorization.

111563643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555113.

The product of its digits is 6480, while the sum is 30.

The square root of 111563643 is about 10562.3691944563. The cubic root of 111563643 is about 481.4016366371.

The spelling of 111563643 in words is "one hundred eleven million, five hundred sixty-three thousand, six hundred forty-three".