2740120561 has 2 divisors, whose sum is σ = 2740120562. Its totient is φ = 2740120560.

The previous prime is 2740120541. The next prime is 2740120573. The reversal of 2740120561 is 1650210472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2733198400 + 6922161 = 52280^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 2740120561 - 2¹⁷ = 2739989489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2740120501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370060280 + 1370060281.

It is an arithmetic number, because the mean of its divisors is an integer number (1370060281).

Almost surely, 2^2740120561 is an apocalyptic number.

It is an amenable number.

2740120561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740120561 is an equidigital number, since it uses as much as digits as its factorization.

2740120561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2740120561 is about 52346.1609002991. The cubic root of 2740120561 is about 1399.3399202935.

The spelling of 2740120561 in words is "two billion, seven hundred forty million, one hundred twenty thousand, five hundred sixty-one".