2745605731 has 4 divisors (see below), whose sum is σ = 2995206264. Its totient is φ = 2496005200.

The previous prime is 2745605717. The next prime is 2745605743. The reversal of 2745605731 is 1375065472.

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

It is a cyclic number.

It is not a de Polignac number, because 2745605731 - 2²⁵ = 2712051299 is a prime.

It is a super-2 number, since 2×2745605731² = 15076701660200088722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2745605531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124800250 + ... + 124800271.

It is an arithmetic number, because the mean of its divisors is an integer number (748801566).

Almost surely, 2^2745605731 is an apocalyptic number.

2745605731 is a deficient number, since it is larger than the sum of its proper divisors (249600533).

2745605731 is a wasteful number, since it uses less digits than its factorization.

2745605731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249600532.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 2745605731 is about 52398.5279468803. The cubic root of 2745605731 is about 1400.2730302531.

The spelling of 2745605731 in words is "two billion, seven hundred forty-five million, six hundred five thousand, seven hundred thirty-one".