2725815845 has 4 divisors (see below), whose sum is σ = 3270979020. Its totient is φ = 2180652672.

The previous prime is 2725815809. The next prime is 2725815877. The reversal of 2725815845 is 5485185272.

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 2109932356 + 615883489 = 45934^2 + 24817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2725815845 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2725815845.

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, 272581580 + ... + 272581589.

It is an arithmetic number, because the mean of its divisors is an integer number (817744755).

Almost surely, 2^2725815845 is an apocalyptic number.

It is an amenable number.

2725815845 is a deficient number, since it is larger than the sum of its proper divisors (545163175).

2725815845 is an equidigital number, since it uses as much as digits as its factorization.

2725815845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545163174.

The product of its digits is 896000, while the sum is 47.

The square root of 2725815845 is about 52209.3463376051. The cubic root of 2725815845 is about 1396.9006000677.

The spelling of 2725815845 in words is "two billion, seven hundred twenty-five million, eight hundred fifteen thousand, eight hundred forty-five".