1635116243 has 2 divisors, whose sum is σ = 1635116244. Its totient is φ = 1635116242.

The previous prime is 1635116213. The next prime is 1635116267. The reversal of 1635116243 is 3426115361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1635116243 - 2¹⁴ = 1635099859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1635116213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817558121 + 817558122.

It is an arithmetic number, because the mean of its divisors is an integer number (817558122).

Almost surely, 2^1635116243 is an apocalyptic number.

1635116243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1635116243 is an equidigital number, since it uses as much as digits as its factorization.

1635116243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 1635116243 is about 40436.5706137402. The cubic root of 1635116243 is about 1178.1019574730.

The spelling of 1635116243 in words is "one billion, six hundred thirty-five million, one hundred sixteen thousand, two hundred forty-three".