65771799450919 has 2 divisors, whose sum is σ = 65771799450920. Its totient is φ = 65771799450918.

The previous prime is 65771799450883. The next prime is 65771799450971. The reversal of 65771799450919 is 91905499717756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65771799450919 - 2²³ = 65771791062311 is a prime.

It is a super-2 number, since 2×65771799450919² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65771799450989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32885899725459 + 32885899725460.

It is an arithmetic number, because the mean of its divisors is an integer number (32885899725460).

Almost surely, 2^{65771799450919} is an apocalyptic number.

65771799450919 is a deficient number, since it is larger than the sum of its proper divisors (1).

65771799450919 is an equidigital number, since it uses as much as digits as its factorization.

65771799450919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350253800, while the sum is 79.

The spelling of 65771799450919 in words is "sixty-five trillion, seven hundred seventy-one billion, seven hundred ninety-nine million, four hundred fifty thousand, nine hundred nineteen".