53521166663473 has 2 divisors, whose sum is σ = 53521166663474. Its totient is φ = 53521166663472.

The previous prime is 53521166663449. The next prime is 53521166663507. The reversal of 53521166663473 is 37436666112535.

53521166663473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52964960956209 + 556205707264 = 7277703^2 + 745792^2 .

It is a cyclic number.

It is not a de Polignac number, because 53521166663473 - 2⁹ = 53521166662961 is a prime.

It is not a weakly prime, because it can be changed into another prime (53521166663873) 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, 26760583331736 + 26760583331737.

It is an arithmetic number, because the mean of its divisors is an integer number (26760583331737).

Almost surely, 2^{53521166663473} is an apocalyptic number.

It is an amenable number.

53521166663473 is a deficient number, since it is larger than the sum of its proper divisors (1).

53521166663473 is an equidigital number, since it uses as much as digits as its factorization.

53521166663473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 58.

The spelling of 53521166663473 in words is "fifty-three trillion, five hundred twenty-one billion, one hundred sixty-six million, six hundred sixty-three thousand, four hundred seventy-three".