65019891067 has 2 divisors, whose sum is σ = 65019891068. Its totient is φ = 65019891066.

The previous prime is 65019891049. The next prime is 65019891077. The reversal of 65019891067 is 76019891056.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65019891067 is a prime.

It is not a weakly prime, because it can be changed into another prime (65019891037) 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, 32509945533 + 32509945534.

It is an arithmetic number, because the mean of its divisors is an integer number (32509945534).

Almost surely, 2^65019891067 is an apocalyptic number.

65019891067 is a deficient number, since it is larger than the sum of its proper divisors (1).

65019891067 is an equidigital number, since it uses as much as digits as its factorization.

65019891067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 52.

It can be divided in two parts, 6501989 and 1067, that added together give a palindrome (6503056).

The spelling of 65019891067 in words is "sixty-five billion, nineteen million, eight hundred ninety-one thousand, sixty-seven".