111640375 has 48 divisors (see below), whose sum is σ = 176915232. Its totient is φ = 69552000.

The previous prime is 111640363. The next prime is 111640379. The reversal of 111640375 is 573046111.

It is not a de Polignac number, because 111640375 - 2⁷ = 111640247 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 (111640379) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 66547 + ... + 68203.

It is an arithmetic number, because the mean of its divisors is an integer number (3685734).

Almost surely, 2^111640375 is an apocalyptic number.

111640375 is a deficient number, since it is larger than the sum of its proper divisors (65274857).

111640375 is a wasteful number, since it uses less digits than its factorization.

111640375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1680 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 111640375 is about 10566.0008991103. Note that the first 3 decimals coincide. The cubic root of 111640375 is about 481.5119785727.

Adding to 111640375 its reverse (573046111), we get a palindrome (684686486).

The spelling of 111640375 in words is "one hundred eleven million, six hundred forty thousand, three hundred seventy-five".