2519797561 has 2 divisors, whose sum is σ = 2519797562. Its totient is φ = 2519797560.

The previous prime is 2519797529. The next prime is 2519797627. The reversal of 2519797561 is 1657979152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2337142336 + 182655225 = 48344^2 + 13515^2 .

It is a cyclic number.

It is not a de Polignac number, because 2519797561 - 2⁵ = 2519797529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2519797499 and 2519797508.

It is not a weakly prime, because it can be changed into another prime (2519747561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259898780 + 1259898781.

It is an arithmetic number, because the mean of its divisors is an integer number (1259898781).

Almost surely, 2^2519797561 is an apocalyptic number.

It is an amenable number.

2519797561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2519797561 is an equidigital number, since it uses as much as digits as its factorization.

2519797561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1190700, while the sum is 52.

The square root of 2519797561 is about 50197.5852108446. The cubic root of 2519797561 is about 1360.7819827015.

The spelling of 2519797561 in words is "two billion, five hundred nineteen million, seven hundred ninety-seven thousand, five hundred sixty-one".