1064440391071 has 2 divisors, whose sum is σ = 1064440391072. Its totient is φ = 1064440391070.

The previous prime is 1064440391051. The next prime is 1064440391107. The reversal of 1064440391071 is 1701930444601.

It is a happy number.

Together with next prime (1064440391107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1701930444601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1064440391071 - 2¹³ = 1064440382879 is a prime.

It is a super-2 number, since 2×1064440391071² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1064440391051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532220195535 + 532220195536.

It is an arithmetic number, because the mean of its divisors is an integer number (532220195536).

Almost surely, 2^{1064440391071} is an apocalyptic number.

1064440391071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1064440391071 is an equidigital number, since it uses as much as digits as its factorization.

1064440391071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 1064440391071 in words is "one trillion, sixty-four billion, four hundred forty million, three hundred ninety-one thousand, seventy-one".