7542686656481 has 2 divisors, whose sum is σ = 7542686656482. Its totient is φ = 7542686656480.

The previous prime is 7542686656457. The next prime is 7542686656523. The reversal of 7542686656481 is 1846566862457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6851725056400 + 690961600081 = 2617580^2 + 831241^2 .

It is a cyclic number.

It is not a de Polignac number, because 7542686656481 - 2³⁰ = 7541612914657 is a prime.

It is a super-2 number, since 2×7542686656481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7542686656441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3771343328240 + 3771343328241.

It is an arithmetic number, because the mean of its divisors is an integer number (3771343328241).

Almost surely, 2^{7542686656481} is an apocalyptic number.

It is an amenable number.

7542686656481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7542686656481 is an equidigital number, since it uses as much as digits as its factorization.

7542686656481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 464486400, while the sum is 68.

The spelling of 7542686656481 in words is "seven trillion, five hundred forty-two billion, six hundred eighty-six million, six hundred fifty-six thousand, four hundred eighty-one".