2133165640 has 16 divisors (see below), whose sum is σ = 4799622780. Its totient is φ = 853266240.

The previous prime is 2133165607. The next prime is 2133165719. The reversal of 2133165640 is 465613312.

It can be written as a sum of positive squares in 2 ways, for example, as 2133146596 + 19044 = 46186^2 + 138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26664531 + ... + 26664610.

Almost surely, 2^2133165640 is an apocalyptic number.

2133165640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2133165640 is an abundant number, since it is smaller than the sum of its proper divisors (2666457140).

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

2133165640 is a wasteful number, since it uses less digits than its factorization.

2133165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53329152 (or 53329148 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2133165640 is about 46186.2061659106. The cubic root of 2133165640 is about 1287.2854481459.

Adding to 2133165640 its reverse (465613312), we get a palindrome (2598778952).

The spelling of 2133165640 in words is "two billion, one hundred thirty-three million, one hundred sixty-five thousand, six hundred forty".