2512616861 has 2 divisors, whose sum is σ = 2512616862. Its totient is φ = 2512616860.

The previous prime is 2512616849. The next prime is 2512616891. The reversal of 2512616861 is 1686162152.

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., 2506904761 + 5712100 = 50069^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2512616861 - 2²² = 2508422557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2512616891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256308430 + 1256308431.

It is an arithmetic number, because the mean of its divisors is an integer number (1256308431).

Almost surely, 2^2512616861 is an apocalyptic number.

It is an amenable number.

2512616861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2512616861 is an equidigital number, since it uses as much as digits as its factorization.

2512616861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 2512616861 is about 50126.0098252394. The cubic root of 2512616861 is about 1359.4881401694.

The spelling of 2512616861 in words is "two billion, five hundred twelve million, six hundred sixteen thousand, eight hundred sixty-one".