5535546816721 has 2 divisors, whose sum is σ = 5535546816722. Its totient is φ = 5535546816720.

The previous prime is 5535546816671. The next prime is 5535546816739. The reversal of 5535546816721 is 1276186455355.

5535546816721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4225984718400 + 1309562098321 = 2055720^2 + 1144361^2 .

It is a cyclic number.

It is not a de Polignac number, because 5535546816721 - 2¹³ = 5535546808529 is a prime.

It is not a weakly prime, because it can be changed into another prime (5535546816791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767773408360 + 2767773408361.

It is an arithmetic number, because the mean of its divisors is an integer number (2767773408361).

Almost surely, 2^{5535546816721} is an apocalyptic number.

It is an amenable number.

5535546816721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5535546816721 is an equidigital number, since it uses as much as digits as its factorization.

5535546816721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240000, while the sum is 58.

The spelling of 5535546816721 in words is "five trillion, five hundred thirty-five billion, five hundred forty-six million, eight hundred sixteen thousand, seven hundred twenty-one".