2646542243 has 16 divisors (see below), whose sum is σ = 2808691200. Its totient is φ = 2486772000.

The previous prime is 2646542231. The next prime is 2646542263. The reversal of 2646542243 is 3422456462.

It is a cyclic number.

It is not a de Polignac number, because 2646542243 - 2¹⁸ = 2646280099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2646542197 and 2646542206.

It is not an unprimeable number, because it can be changed into a prime (2646542263) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1281830 + ... + 1283892.

It is an arithmetic number, because the mean of its divisors is an integer number (175543200).

Almost surely, 2^2646542243 is an apocalyptic number.

2646542243 is a deficient number, since it is larger than the sum of its proper divisors (162148957).

2646542243 is a wasteful number, since it uses less digits than its factorization.

2646542243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602.

The product of its digits is 276480, while the sum is 38.

The square root of 2646542243 is about 51444.5550374381. Note that the first 3 decimals coincide. The cubic root of 2646542243 is about 1383.2253625251.

The spelling of 2646542243 in words is "two billion, six hundred forty-six million, five hundred forty-two thousand, two hundred forty-three".