42257827879 has 4 divisors (see below), whose sum is σ = 42284125584. Its totient is φ = 42231530176.

The previous prime is 42257827853. The next prime is 42257827907. The reversal of 42257827879 is 97872875224.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42257827879 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 (42257825879) 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, 13146442 + ... + 13149655.

It is an arithmetic number, because the mean of its divisors is an integer number (10571031396).

Almost surely, 2^42257827879 is an apocalyptic number.

42257827879 is a deficient number, since it is larger than the sum of its proper divisors (26297705).

42257827879 is a wasteful number, since it uses less digits than its factorization.

42257827879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26297704.

The product of its digits is 31610880, while the sum is 61.

The spelling of 42257827879 in words is "forty-two billion, two hundred fifty-seven million, eight hundred twenty-seven thousand, eight hundred seventy-nine".