2643243660 has 72 divisors (see below), whose sum is σ = 8153767440. Its totient is φ = 692915328.

The previous prime is 2643243619. The next prime is 2643243677. The reversal of 2643243660 is 663423462.

2643243660 is a `hidden beast` number, since 2 + 643 + 2 + 4 + 3 + 6 + 6 + 0 = 666.

It is a super-2 number, since 2×2643243660² = 13973474092260391200, 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 23 ways as a sum of consecutive naturals, for example, 113827 + ... + 135066.

It is an arithmetic number, because the mean of its divisors is an integer number (113246770).

Almost surely, 2^2643243660 is an apocalyptic number.

2643243660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2643243660 is an abundant number, since it is smaller than the sum of its proper divisors (5510523780).

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

2643243660 is a wasteful number, since it uses less digits than its factorization.

2643243660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248967 (or 248962 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The square root of 2643243660 is about 51412.4854485756. The cubic root of 2643243660 is about 1382.6504512931.

The spelling of 2643243660 in words is "two billion, six hundred forty-three million, two hundred forty-three thousand, six hundred sixty".