49881666666653 has 2 divisors, whose sum is σ = 49881666666654. Its totient is φ = 49881666666652.

The previous prime is 49881666666523. The next prime is 49881666666673. The reversal of 49881666666653 is 35666666618894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44796222228004 + 5085444438649 = 6692998^2 + 2255093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49881666666653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49881666666673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24940833333326 + 24940833333327.

It is an arithmetic number, because the mean of its divisors is an integer number (24940833333327).

Almost surely, 2^{49881666666653} is an apocalyptic number.

It is an amenable number.

49881666666653 is a deficient number, since it is larger than the sum of its proper divisors (1).

49881666666653 is an equidigital number, since it uses as much as digits as its factorization.

49881666666653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9674588160, while the sum is 80.

The spelling of 49881666666653 in words is "forty-nine trillion, eight hundred eighty-one billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred fifty-three".