2605761245 has 4 divisors (see below), whose sum is σ = 3126913500. Its totient is φ = 2084608992.

The previous prime is 2605761233. The next prime is 2605761307. The reversal of 2605761245 is 5421675062.

2605761245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5421675062 = 2 ⋅2710837531.

It can be written as a sum of positive squares in 2 ways, for example, as 1789459204 + 816302041 = 42302^2 + 28571^2 .

It is a cyclic number.

It is not a de Polignac number, because 2605761245 - 2⁴ = 2605761229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2605761199 and 2605761208.

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, 260576120 + ... + 260576129.

It is an arithmetic number, because the mean of its divisors is an integer number (781728375).

Almost surely, 2^2605761245 is an apocalyptic number.

It is an amenable number.

2605761245 is a deficient number, since it is larger than the sum of its proper divisors (521152255).

2605761245 is an equidigital number, since it uses as much as digits as its factorization.

2605761245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521152254.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 2605761245 is about 51046.6575301459. The cubic root of 2605761245 is about 1376.0837727653.

The spelling of 2605761245 in words is "two billion, six hundred five million, seven hundred sixty-one thousand, two hundred forty-five".