42188219687 has 4 divisors (see below), whose sum is σ = 42207337536. Its totient is φ = 42169101840.

The previous prime is 42188219681. The next prime is 42188219719. The reversal of 42188219687 is 78691288124.

42188219687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42188219687 - 2⁸ = 42188219431 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 (42188219681) 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, 9555614 + ... + 9560027.

It is an arithmetic number, because the mean of its divisors is an integer number (10551834384).

Almost surely, 2^42188219687 is an apocalyptic number.

42188219687 is a deficient number, since it is larger than the sum of its proper divisors (19117849).

42188219687 is a wasteful number, since it uses less digits than its factorization.

42188219687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19117848.

The product of its digits is 3096576, while the sum is 56.

The spelling of 42188219687 in words is "forty-two billion, one hundred eighty-eight million, two hundred nineteen thousand, six hundred eighty-seven".