542157591242 has 8 divisors (see below), whose sum is σ = 828580469796. Its totient is φ = 265964101312.

The previous prime is 542157591223. The next prime is 542157591263. The reversal of 542157591242 is 242195751245.

It can be written as a sum of positive squares in 2 ways, for example, as 523508684521 + 18648906721 = 723539^2 + 136561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557347023 + ... + 2557347234.

Almost surely, 2^542157591242 is an apocalyptic number.

542157591242 is a deficient number, since it is larger than the sum of its proper divisors (286422878554).

542157591242 is a wasteful number, since it uses less digits than its factorization.

542157591242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114694312.

The product of its digits is 1008000, while the sum is 47.

The spelling of 542157591242 in words is "five hundred forty-two billion, one hundred fifty-seven million, five hundred ninety-one thousand, two hundred forty-two".