5642454614521 has 2 divisors, whose sum is σ = 5642454614522. Its totient is φ = 5642454614520.

The previous prime is 5642454614449. The next prime is 5642454614561. The reversal of 5642454614521 is 1254164542465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4985931726400 + 656522888121 = 2232920^2 + 810261^2 .

It is a cyclic number.

It is not a de Polignac number, because 5642454614521 - 2⁹ = 5642454614009 is a prime.

It is not a weakly prime, because it can be changed into another prime (5642454614561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821227307260 + 2821227307261.

It is an arithmetic number, because the mean of its divisors is an integer number (2821227307261).

Almost surely, 2^{5642454614521} is an apocalyptic number.

It is an amenable number.

5642454614521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642454614521 is an equidigital number, since it uses as much as digits as its factorization.

5642454614521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608000, while the sum is 49.

The spelling of 5642454614521 in words is "five trillion, six hundred forty-two billion, four hundred fifty-four million, six hundred fourteen thousand, five hundred twenty-one".