542236466561 has 2 divisors, whose sum is σ = 542236466562. Its totient is φ = 542236466560.

The previous prime is 542236466509. The next prime is 542236466617. The reversal of 542236466561 is 165664632245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475349575936 + 66886890625 = 689456^2 + 258625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542236466561 is a prime.

It is not a weakly prime, because it can be changed into another prime (542236462561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271118233280 + 271118233281.

It is an arithmetic number, because the mean of its divisors is an integer number (271118233281).

Almost surely, 2^542236466561 is an apocalyptic number.

It is an amenable number.

542236466561 is a deficient number, since it is larger than the sum of its proper divisors (1).

542236466561 is an equidigital number, since it uses as much as digits as its factorization.

542236466561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 50.

The spelling of 542236466561 in words is "five hundred forty-two billion, two hundred thirty-six million, four hundred sixty-six thousand, five hundred sixty-one".