542422066642 has 4 divisors (see below), whose sum is σ = 813633099966. Its totient is φ = 271211033320.

The previous prime is 542422066603. The next prime is 542422066657. The reversal of 542422066642 is 246660224245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246660224245 = 5 ⋅49332044849.

It can be written as a sum of positive squares in only one way, i.e., 504723572721 + 37698493921 = 710439^2 + 194161^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135605516659 + ... + 135605516662.

Almost surely, 2^542422066642 is an apocalyptic number.

542422066642 is a deficient number, since it is larger than the sum of its proper divisors (271211033324).

542422066642 is a wasteful number, since it uses less digits than its factorization.

542422066642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271211033323.

The product of its (nonzero) digits is 1105920, while the sum is 43.

The spelling of 542422066642 in words is "five hundred forty-two billion, four hundred twenty-two million, sixty-six thousand, six hundred forty-two".