2708672561 has 4 divisors (see below), whose sum is σ = 3095625792. Its totient is φ = 2321719332.

The previous prime is 2708672521. The next prime is 2708672569. The reversal of 2708672561 is 1652768072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2708672561 - 2⁶ = 2708672497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2708672569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193476605 + ... + 193476618.

It is an arithmetic number, because the mean of its divisors is an integer number (773906448).

Almost surely, 2^2708672561 is an apocalyptic number.

It is an amenable number.

2708672561 is a deficient number, since it is larger than the sum of its proper divisors (386953231).

2708672561 is an equidigital number, since it uses as much as digits as its factorization.

2708672561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386953230.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 2708672561 is about 52044.9090786025. The cubic root of 2708672561 is about 1393.9659626443.

The spelling of 2708672561 in words is "two billion, seven hundred eight million, six hundred seventy-two thousand, five hundred sixty-one".