542646618197 has 4 divisors (see below), whose sum is σ = 542657583936. Its totient is φ = 542635652460.

The previous prime is 542646618193. The next prime is 542646618203. The reversal of 542646618197 is 791816646245.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 542646618197 - 2² = 542646618193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542646618193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5408303 + ... + 5507724.

It is an arithmetic number, because the mean of its divisors is an integer number (135664395984).

Almost surely, 2^542646618197 is an apocalyptic number.

It is an amenable number.

542646618197 is a deficient number, since it is larger than the sum of its proper divisors (10965739).

542646618197 is a wasteful number, since it uses less digits than its factorization.

542646618197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10965738.

The product of its digits is 17418240, while the sum is 59.

The spelling of 542646618197 in words is "five hundred forty-two billion, six hundred forty-six million, six hundred eighteen thousand, one hundred ninety-seven".