42174131638 has 4 divisors (see below), whose sum is σ = 63261197460. Its totient is φ = 21087065818.

The previous prime is 42174131609. The next prime is 42174131639. The reversal of 42174131638 is 83613147124.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42174131638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42174131639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10543532908 + ... + 10543532911.

It is an arithmetic number, because the mean of its divisors is an integer number (15815299365).

Almost surely, 2^42174131638 is an apocalyptic number.

42174131638 is a deficient number, since it is larger than the sum of its proper divisors (21087065822).

42174131638 is a wasteful number, since it uses less digits than its factorization.

42174131638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21087065821.

The product of its digits is 96768, while the sum is 40.

The spelling of 42174131638 in words is "forty-two billion, one hundred seventy-four million, one hundred thirty-one thousand, six hundred thirty-eight".