42238578079 has 4 divisors (see below), whose sum is σ = 42239000200. Its totient is φ = 42238155960.

The previous prime is 42238578071. The next prime is 42238578089. The reversal of 42238578079 is 97087583224.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42238578079 - 2³ = 42238578071 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 (42238578071) 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, 33472 + ... + 292570.

It is an arithmetic number, because the mean of its divisors is an integer number (10559750050).

Almost surely, 2^42238578079 is an apocalyptic number.

42238578079 is a deficient number, since it is larger than the sum of its proper divisors (422121).

42238578079 is a wasteful number, since it uses less digits than its factorization.

42238578079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422120.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 42238578079 in words is "forty-two billion, two hundred thirty-eight million, five hundred seventy-eight thousand, seventy-nine".