2545682687 has 4 divisors (see below), whose sum is σ = 2549795880. Its totient is φ = 2541569496.

The previous prime is 2545682677. The next prime is 2545682693. The reversal of 2545682687 is 7862865452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545682687 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 (2545682627) 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, 2055668 + ... + 2056905.

It is an arithmetic number, because the mean of its divisors is an integer number (637448970).

Almost surely, 2^2545682687 is an apocalyptic number.

2545682687 is a deficient number, since it is larger than the sum of its proper divisors (4113193).

2545682687 is an equidigital number, since it uses as much as digits as its factorization.

2545682687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113192.

The product of its digits is 6451200, while the sum is 53.

The square root of 2545682687 is about 50454.7588142090. The cubic root of 2545682687 is about 1365.4257527747.

The spelling of 2545682687 in words is "two billion, five hundred forty-five million, six hundred eighty-two thousand, six hundred eighty-seven".