111661456 has 10 divisors (see below), whose sum is σ = 216344102. Its totient is φ = 55830720.

The previous prime is 111661441. The next prime is 111661469. The reversal of 111661456 is 654166111.

It can be written as a sum of positive squares in only one way, i.e., 108493056 + 3168400 = 10416^2 + 1780^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3489405 + ... + 3489436.

Almost surely, 2^111661456 is an apocalyptic number.

111661456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

111661456 is a deficient number, since it is larger than the sum of its proper divisors (104682646).

111661456 is an equidigital number, since it uses as much as digits as its factorization.

111661456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978849 (or 6978843 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 111661456 is about 10566.9984385349. The cubic root of 111661456 is about 481.5422845594.

The spelling of 111661456 in words is "one hundred eleven million, six hundred sixty-one thousand, four hundred fifty-six".