111640564 has 24 divisors (see below), whose sum is σ = 236416320. Its totient is φ = 45031296.

The previous prime is 111640541. The next prime is 111640577. The reversal of 111640564 is 465046111.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 116794 + ... + 117745.

It is an arithmetic number, because the mean of its divisors is an integer number (9850680).

Almost surely, 2^111640564 is an apocalyptic number.

111640564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

111640564 is an abundant number, since it is smaller than the sum of its proper divisors (124775756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111640564 is a wasteful number, since it uses less digits than its factorization.

111640564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234567 (or 234565 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 111640564 is about 10566.0098428877. The cubic root of 111640564 is about 481.5122502955.

Adding to 111640564 its reverse (465046111), we get a palindrome (576686675).

The spelling of 111640564 in words is "one hundred eleven million, six hundred forty thousand, five hundred sixty-four".