2506816573 has 4 divisors (see below), whose sum is σ = 2509123840. Its totient is φ = 2504509308.

The previous prime is 2506816541. The next prime is 2506816589. The reversal of 2506816573 is 3756186052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2506816573 - 2⁵ = 2506816541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506816673) 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 3 ways as a sum of consecutive naturals, for example, 1152003 + ... + 1154176.

It is an arithmetic number, because the mean of its divisors is an integer number (627280960).

Almost surely, 2^2506816573 is an apocalyptic number.

It is an amenable number.

2506816573 is a deficient number, since it is larger than the sum of its proper divisors (2307267).

2506816573 is a wasteful number, since it uses less digits than its factorization.

2506816573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307266.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 2506816573 is about 50068.1193275721. The cubic root of 2506816573 is about 1358.4412239175.

The spelling of 2506816573 in words is "two billion, five hundred six million, eight hundred sixteen thousand, five hundred seventy-three".