2516440561 has 2 divisors, whose sum is σ = 2516440562. Its totient is φ = 2516440560.

The previous prime is 2516440501. The next prime is 2516440607. The reversal of 2516440561 is 1650446152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371294961 + 1145145600 = 37031^2 + 33840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2516440561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2516440501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258220280 + 1258220281.

It is an arithmetic number, because the mean of its divisors is an integer number (1258220281).

Almost surely, 2^2516440561 is an apocalyptic number.

It is an amenable number.

2516440561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516440561 is an equidigital number, since it uses as much as digits as its factorization.

2516440561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 2516440561 is about 50164.1362030684. The cubic root of 2516440561 is about 1360.1774135983.

The spelling of 2516440561 in words is "two billion, five hundred sixteen million, four hundred forty thousand, five hundred sixty-one".