111545661 has 8 divisors (see below), whose sum is σ = 148776544. Its totient is φ = 74339280.

The previous prime is 111545647. The next prime is 111545683. The reversal of 111545661 is 166545111.

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

It is not a de Polignac number, because 111545661 - 2⁶ = 111545597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111545641) 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, 13326 + ... + 20016.

It is an arithmetic number, because the mean of its divisors is an integer number (18597068).

Almost surely, 2^111545661 is an apocalyptic number.

It is an amenable number.

111545661 is a deficient number, since it is larger than the sum of its proper divisors (37230883).

111545661 is an equidigital number, since it uses as much as digits as its factorization.

111545661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12251.

The product of its digits is 3600, while the sum is 30.

The square root of 111545661 is about 10561.5179306764. The cubic root of 111545661 is about 481.3757708947.

The spelling of 111545661 in words is "one hundred eleven million, five hundred forty-five thousand, six hundred sixty-one".