71154664721633 has 2 divisors, whose sum is σ = 71154664721634. Its totient is φ = 71154664721632.

The previous prime is 71154664721597. The next prime is 71154664721681. The reversal of 71154664721633 is 33612746645117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70506048716944 + 648616004689 = 8396788^2 + 805367^2 .

It is a cyclic number.

It is not a de Polignac number, because 71154664721633 - 2²⁸ = 71154396286177 is a prime.

It is not a weakly prime, because it can be changed into another prime (71154664721683) 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, 35577332360816 + 35577332360817.

It is an arithmetic number, because the mean of its divisors is an integer number (35577332360817).

Almost surely, 2^{71154664721633} is an apocalyptic number.

It is an amenable number.

71154664721633 is a deficient number, since it is larger than the sum of its proper divisors (1).

71154664721633 is an equidigital number, since it uses as much as digits as its factorization.

71154664721633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 56.

The spelling of 71154664721633 in words is "seventy-one trillion, one hundred fifty-four billion, six hundred sixty-four million, seven hundred twenty-one thousand, six hundred thirty-three".