542405656571 has 2 divisors, whose sum is σ = 542405656572. Its totient is φ = 542405656570.

The previous prime is 542405656511. The next prime is 542405656627. The reversal of 542405656571 is 175656504245.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542405656571 is a prime.

It is not a weakly prime, because it can be changed into another prime (542405656511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271202828285 + 271202828286.

It is an arithmetic number, because the mean of its divisors is an integer number (271202828286).

Almost surely, 2^542405656571 is an apocalyptic number.

542405656571 is a deficient number, since it is larger than the sum of its proper divisors (1).

542405656571 is an equidigital number, since it uses as much as digits as its factorization.

542405656571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040000, while the sum is 50.

The spelling of 542405656571 in words is "five hundred forty-two billion, four hundred five million, six hundred fifty-six thousand, five hundred seventy-one".