42718215938 has 4 divisors (see below), whose sum is σ = 64077323910. Its totient is φ = 21359107968.

The previous prime is 42718215937. The next prime is 42718215959. The reversal of 42718215938 is 83951281724.

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

It can be written as a sum of positive squares in only one way, i.e., 29706935449 + 13011280489 = 172357^2 + 114067^2 .

It is not an unprimeable number, because it can be changed into a prime (42718215937) 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 as a sum of consecutive naturals, namely, 10679553983 + ... + 10679553986.

Almost surely, 2^42718215938 is an apocalyptic number.

42718215938 is a deficient number, since it is larger than the sum of its proper divisors (21359107972).

42718215938 is a wasteful number, since it uses less digits than its factorization.

42718215938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21359107971.

The product of its digits is 967680, while the sum is 50.

The spelling of 42718215938 in words is "forty-two billion, seven hundred eighteen million, two hundred fifteen thousand, nine hundred thirty-eight".