65816991419 has 2 divisors, whose sum is σ = 65816991420. Its totient is φ = 65816991418.

The previous prime is 65816991371. The next prime is 65816991421. The reversal of 65816991419 is 91419961856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65816991419 - 2²⁴ = 65800214203 is a prime.

It is a super-3 number, since 3×65816991419³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 65816991421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65816991319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32908495709 + 32908495710.

It is an arithmetic number, because the mean of its divisors is an integer number (32908495710).

Almost surely, 2^65816991419 is an apocalyptic number.

65816991419 is a deficient number, since it is larger than the sum of its proper divisors (1).

65816991419 is an equidigital number, since it uses as much as digits as its factorization.

65816991419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 59.

The spelling of 65816991419 in words is "sixty-five billion, eight hundred sixteen million, nine hundred ninety-one thousand, four hundred nineteen".