542040425261 has 2 divisors, whose sum is σ = 542040425262. Its totient is φ = 542040425260.

The previous prime is 542040425197. The next prime is 542040425281. The reversal of 542040425261 is 162524040245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526794349636 + 15246075625 = 725806^2 + 123475^2 .

It is a cyclic number.

It is not a de Polignac number, because 542040425261 - 2⁶ = 542040425197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542040425281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271020212630 + 271020212631.

It is an arithmetic number, because the mean of its divisors is an integer number (271020212631).

Almost surely, 2^542040425261 is an apocalyptic number.

It is an amenable number.

542040425261 is a deficient number, since it is larger than the sum of its proper divisors (1).

542040425261 is an equidigital number, since it uses as much as digits as its factorization.

542040425261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 542040425261 in words is "five hundred forty-two billion, forty million, four hundred twenty-five thousand, two hundred sixty-one".