63516491 has 2 divisors, whose sum is σ = 63516492. Its totient is φ = 63516490.

The previous prime is 63516451. The next prime is 63516517. The reversal of 63516491 is 19461536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63516491 - 2¹⁰ = 63515467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63516451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31758245 + 31758246.

It is an arithmetic number, because the mean of its divisors is an integer number (31758246).

Almost surely, 2^63516491 is an apocalyptic number.

63516491 is a deficient number, since it is larger than the sum of its proper divisors (1).

63516491 is an equidigital number, since it uses as much as digits as its factorization.

63516491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 63516491 is about 7969.7233954511. The cubic root of 63516491 is about 398.9901421969.

The spelling of 63516491 in words is "sixty-three million, five hundred sixteen thousand, four hundred ninety-one".