111980645 has 16 divisors (see below), whose sum is σ = 153809280. Its totient is φ = 76668864.

The previous prime is 111980641. The next prime is 111980653. The reversal of 111980645 is 546089111.

It is a cyclic number.

It is not a de Polignac number, because 111980645 - 2² = 111980641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111980641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24986 + ... + 29124.

It is an arithmetic number, because the mean of its divisors is an integer number (9613080).

Almost surely, 2^111980645 is an apocalyptic number.

It is an amenable number.

111980645 is a deficient number, since it is larger than the sum of its proper divisors (41828635).

111980645 is an equidigital number, since it uses as much as digits as its factorization.

111980645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 111980645 is about 10582.0907669515. The cubic root of 111980645 is about 482.0006843881. Note that the first 3 decimals are identical.

The spelling of 111980645 in words is "one hundred eleven million, nine hundred eighty thousand, six hundred forty-five".