542581663 has 4 divisors (see below), whose sum is σ = 584318728. Its totient is φ = 500844600.

The previous prime is 542581657. The next prime is 542581667. The reversal of 542581663 is 366185245.

542581663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 542581663 - 2¹⁷ = 542450591 is a prime.

It is a super-2 number, since 2×542581663² = 588789722047691138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542581667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20868513 + ... + 20868538.

It is an arithmetic number, because the mean of its divisors is an integer number (146079682).

Almost surely, 2^542581663 is an apocalyptic number.

542581663 is a deficient number, since it is larger than the sum of its proper divisors (41737065).

542581663 is a wasteful number, since it uses less digits than its factorization.

542581663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41737064.

The product of its digits is 172800, while the sum is 40.

The square root of 542581663 is about 23293.3823864204. The cubic root of 542581663 is about 815.6209467324.

The spelling of 542581663 in words is "five hundred forty-two million, five hundred eighty-one thousand, six hundred sixty-three".