42985943138 has 8 divisors (see below), whose sum is σ = 64632072540. Its totient is φ = 21441918960.

The previous prime is 42985943131. The next prime is 42985943153. The reversal of 42985943138 is 83134958924.

It can be written as a sum of positive squares in 2 ways, for example, as 40355586769 + 2630356369 = 200887^2 + 51287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42985943131) 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, 25525253 + ... + 25526936.

Almost surely, 2^42985943138 is an apocalyptic number.

42985943138 is a deficient number, since it is larger than the sum of its proper divisors (21646129402).

42985943138 is a wasteful number, since it uses less digits than its factorization.

42985943138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51052612.

The product of its digits is 7464960, while the sum is 56.

The spelling of 42985943138 in words is "forty-two billion, nine hundred eighty-five million, nine hundred forty-three thousand, one hundred thirty-eight".