2506202605 has 4 divisors (see below), whose sum is σ = 3007443132. Its totient is φ = 2004962080.

The previous prime is 2506202597. The next prime is 2506202653. The reversal of 2506202605 is 5062026052.

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 1908204489 + 597998116 = 43683^2 + 24454^2 .

It is not a de Polignac number, because 2506202605 - 2³ = 2506202597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250620256 + ... + 250620265.

It is an arithmetic number, because the mean of its divisors is an integer number (751860783).

Almost surely, 2^2506202605 is an apocalyptic number.

It is an amenable number.

2506202605 is a deficient number, since it is larger than the sum of its proper divisors (501240527).

2506202605 is an equidigital number, since it uses as much as digits as its factorization.

2506202605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501240526.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2506202605 is about 50061.9876253430. The cubic root of 2506202605 is about 1358.3303119943.

Adding to 2506202605 its reverse (5062026052), we get a palindrome (7568228657).

The spelling of 2506202605 in words is "two billion, five hundred six million, two hundred two thousand, six hundred five".