515495280493 has 2 divisors, whose sum is σ = 515495280494. Its totient is φ = 515495280492.

The previous prime is 515495280373. The next prime is 515495280499. The reversal of 515495280493 is 394082594515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297371721124 + 218123559369 = 545318^2 + 467037^2 .

It is a cyclic number.

It is not a de Polignac number, because 515495280493 - 2¹³ = 515495272301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515495280499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257747640246 + 257747640247.

It is an arithmetic number, because the mean of its divisors is an integer number (257747640247).

Almost surely, 2^515495280493 is an apocalyptic number.

It is an amenable number.

515495280493 is a deficient number, since it is larger than the sum of its proper divisors (1).

515495280493 is an equidigital number, since it uses as much as digits as its factorization.

515495280493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 515495280493 in words is "five hundred fifteen billion, four hundred ninety-five million, two hundred eighty thousand, four hundred ninety-three".