111640252266 has 32 divisors (see below), whose sum is σ = 248271897600. Its totient is φ = 37186050240.

The previous prime is 111640252261. The next prime is 111640252267. The reversal of 111640252266 is 662252046111.

111640252266 is a `hidden beast` number, since 1 + 1 + 1 + 640 + 2 + 5 + 2 + 2 + 6 + 6 = 666.

It is a super-2 number, since 2×111640252266² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111640252266.

It is not an unprimeable number, because it can be changed into a prime (111640252261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686026 + ... + 833013.

It is an arithmetic number, because the mean of its divisors is an integer number (7758496800).

Almost surely, 2^111640252266 is an apocalyptic number.

111640252266 is an abundant number, since it is smaller than the sum of its proper divisors (136631645334).

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

111640252266 is a wasteful number, since it uses less digits than its factorization.

111640252266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520411 (or 1520405 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 111640252266 its reverse (662252046111), we get a palindrome (773892298377).

The spelling of 111640252266 in words is "one hundred eleven billion, six hundred forty million, two hundred fifty-two thousand, two hundred sixty-six".