2543042646 has 24 divisors (see below), whose sum is σ = 5527654704. Its totient is φ = 844953360.

The previous prime is 2543042641. The next prime is 2543042647. The reversal of 2543042646 is 6462403452.

2543042646 is a `hidden beast` number, since 2 + 5 + 4 + 3 + 0 + 4 + 2 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2543042646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543042641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221541 + ... + 232736.

It is an arithmetic number, because the mean of its divisors is an integer number (230318946).

Almost surely, 2^2543042646 is an apocalyptic number.

2543042646 is an abundant number, since it is smaller than the sum of its proper divisors (2984612058).

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

2543042646 is a wasteful number, since it uses less digits than its factorization.

2543042646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454596 (or 454593 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The square root of 2543042646 is about 50428.5895698065. The cubic root of 2543042646 is about 1364.9535772966.

The spelling of 2543042646 in words is "two billion, five hundred forty-three million, forty-two thousand, six hundred forty-six".