515066641261 has 2 divisors, whose sum is σ = 515066641262. Its totient is φ = 515066641260.

The previous prime is 515066641259. The next prime is 515066641279. The reversal of 515066641261 is 162146660515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313370442025 + 201696199236 = 559795^2 + 449106^2 .

It is a cyclic number.

It is not a de Polignac number, because 515066641261 - 2¹ = 515066641259 is a prime.

Together with 515066641259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515066641241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257533320630 + 257533320631.

It is an arithmetic number, because the mean of its divisors is an integer number (257533320631).

Almost surely, 2^515066641261 is an apocalyptic number.

It is an amenable number.

515066641261 is a deficient number, since it is larger than the sum of its proper divisors (1).

515066641261 is an equidigital number, since it uses as much as digits as its factorization.

515066641261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 515066641261 in words is "five hundred fifteen billion, sixty-six million, six hundred forty-one thousand, two hundred sixty-one".