2675645561 has 2 divisors, whose sum is σ = 2675645562. Its totient is φ = 2675645560.

The previous prime is 2675645551. The next prime is 2675645573. The reversal of 2675645561 is 1655465762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2654310400 + 21335161 = 51520^2 + 4619^2 .

It is a cyclic number.

It is not a de Polignac number, because 2675645561 - 2¹⁰ = 2675644537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2675645551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1337822780 + 1337822781.

It is an arithmetic number, because the mean of its divisors is an integer number (1337822781).

Almost surely, 2^2675645561 is an apocalyptic number.

It is an amenable number.

2675645561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2675645561 is an equidigital number, since it uses as much as digits as its factorization.

2675645561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 47.

The square root of 2675645561 is about 51726.6426612051. The cubic root of 2675645561 is about 1388.2772095171.

The spelling of 2675645561 in words is "two billion, six hundred seventy-five million, six hundred forty-five thousand, five hundred sixty-one".