542233455561 has 18 divisors (see below), whose sum is σ = 911099752602. Its totient is φ = 309847688640.

The previous prime is 542233455539. The next prime is 542233455581. The reversal of 542233455561 is 165554332245.

542233455561 is a `hidden beast` number, since 5 + 4 + 2 + 2 + 3 + 34 + 55 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 542202486336 + 30969225 = 736344^2 + 5565^2 .

It is not a de Polignac number, because 542233455561 - 2⁵ = 542233455529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542233455581) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 614776720 + ... + 614777601.

Almost surely, 2^542233455561 is an apocalyptic number.

It is an amenable number.

542233455561 is a deficient number, since it is larger than the sum of its proper divisors (368866297041).

542233455561 is a wasteful number, since it uses less digits than its factorization.

542233455561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229554341 (or 1229554331 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 45.

The spelling of 542233455561 in words is "five hundred forty-two billion, two hundred thirty-three million, four hundred fifty-five thousand, five hundred sixty-one".