2643135660 has 144 divisors (see below), whose sum is σ = 8833642272. Its totient is φ = 634368000.

The previous prime is 2643135647. The next prime is 2643135701. The reversal of 2643135660 is 665313462.

2643135660 is a `hidden beast` number, since 2 + 64 + 31 + 3 + 566 + 0 = 666.

It is a super-2 number, since 2×2643135660² = 13972332234327271200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 193372 + ... + 206588.

It is an arithmetic number, because the mean of its divisors is an integer number (61344738).

Almost surely, 2^2643135660 is an apocalyptic number.

2643135660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2643135660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4416821136).

2643135660 is an abundant number, since it is smaller than the sum of its proper divisors (6190506612).

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

2643135660 is a wasteful number, since it uses less digits than its factorization.

2643135660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13344 (or 13339 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 2643135660 is about 51411.4351093217. The cubic root of 2643135660 is about 1382.6316198494.

The spelling of 2643135660 in words is "two billion, six hundred forty-three million, one hundred thirty-five thousand, six hundred sixty".