2719636561 has 2 divisors, whose sum is σ = 2719636562. Its totient is φ = 2719636560.

The previous prime is 2719636519. The next prime is 2719636589. The reversal of 2719636561 is 1656369172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2301024961 + 418611600 = 47969^2 + 20460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2719636561 - 2¹¹ = 2719634513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2719639561) 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 as a sum of consecutive naturals, namely, 1359818280 + 1359818281.

It is an arithmetic number, because the mean of its divisors is an integer number (1359818281).

Almost surely, 2^2719636561 is an apocalyptic number.

It is an amenable number.

2719636561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2719636561 is an equidigital number, since it uses as much as digits as its factorization.

2719636561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 2719636561 is about 52150.1348128651. The cubic root of 2719636561 is about 1395.8442342069.

The spelling of 2719636561 in words is "two billion, seven hundred nineteen million, six hundred thirty-six thousand, five hundred sixty-one".