2745340561 has 4 divisors (see below), whose sum is σ = 2746777572. Its totient is φ = 2743903552.

The previous prime is 2745340531. The next prime is 2745340567. The reversal of 2745340561 is 1650435472.

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 1377820161 + 1367520400 = 37119^2 + 36980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2745340561 - 2⁵ = 2745340529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2745340561.

It is not an unprimeable number, because it can be changed into a prime (2745340567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715636 + ... + 719461.

It is an arithmetic number, because the mean of its divisors is an integer number (686694393).

Almost surely, 2^2745340561 is an apocalyptic number.

It is an amenable number.

2745340561 is a deficient number, since it is larger than the sum of its proper divisors (1437011).

2745340561 is a wasteful number, since it uses less digits than its factorization.

2745340561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437010.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 2745340561 is about 52395.9975666081. The cubic root of 2745340561 is about 1400.2279494476.

The spelling of 2745340561 in words is "two billion, seven hundred forty-five million, three hundred forty thousand, five hundred sixty-one".