2506810613 has 4 divisors (see below), whose sum is σ = 2509835340. Its totient is φ = 2503785888.

The previous prime is 2506810597. The next prime is 2506810627. The reversal of 2506810613 is 3160186052.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2103323044 + 403487569 = 45862^2 + 20087^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506810613 - 2⁴ = 2506810597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2506810613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506810693) 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, 1511120 + ... + 1512777.

It is an arithmetic number, because the mean of its divisors is an integer number (627458835).

Almost surely, 2^2506810613 is an apocalyptic number.

It is an amenable number.

2506810613 is a deficient number, since it is larger than the sum of its proper divisors (3024727).

2506810613 is an equidigital number, since it uses as much as digits as its factorization.

2506810613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024726.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2506810613 is about 50068.0598086245. The cubic root of 2506810613 is about 1358.4401473441.

Adding to 2506810613 its reverse (3160186052), we get a palindrome (5666996665).

The spelling of 2506810613 in words is "two billion, five hundred six million, eight hundred ten thousand, six hundred thirteen".