2573871643 has 4 divisors (see below), whose sum is σ = 2941567600. Its totient is φ = 2206175688.

The previous prime is 2573871631. The next prime is 2573871653. The reversal of 2573871643 is 3461783752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2573871643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2573871593 and 2573871602.

It is not an unprimeable number, because it can be changed into a prime (2573871653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183847968 + ... + 183847981.

It is an arithmetic number, because the mean of its divisors is an integer number (735391900).

Almost surely, 2^2573871643 is an apocalyptic number.

2573871643 is a deficient number, since it is larger than the sum of its proper divisors (367695957).

2573871643 is an equidigital number, since it uses as much as digits as its factorization.

2573871643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367695956.

The product of its digits is 846720, while the sum is 46.

The square root of 2573871643 is about 50733.3385753392. The cubic root of 2573871643 is about 1370.4471595200.

The spelling of 2573871643 in words is "two billion, five hundred seventy-three million, eight hundred seventy-one thousand, six hundred forty-three".