2719895561 has 2 divisors, whose sum is σ = 2719895562. Its totient is φ = 2719895560.

The previous prime is 2719895551. The next prime is 2719895573. The reversal of 2719895561 is 1655989172.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2146005625 + 573889936 = 46325^2 + 23956^2 .

It is a cyclic number.

It is not a de Polignac number, because 2719895561 - 2¹⁴ = 2719879177 is a prime.

It is a super-3 number, since 3×2719895561³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2719895531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359947780 + 1359947781.

It is an arithmetic number, because the mean of its divisors is an integer number (1359947781).

Almost surely, 2^2719895561 is an apocalyptic number.

It is an amenable number.

2719895561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2719895561 is an equidigital number, since it uses as much as digits as its factorization.

2719895561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 53.

The square root of 2719895561 is about 52152.6179688038. The cubic root of 2719895561 is about 1395.8885430907. Note that the first 3 decimals are identical.

The spelling of 2719895561 in words is "two billion, seven hundred nineteen million, eight hundred ninety-five thousand, five hundred sixty-one".