42138662449 has 8 divisors (see below), whose sum is σ = 45726512832. Its totient is φ = 38600299920.

The previous prime is 42138662443. The next prime is 42138662473. The reversal of 42138662449 is 94426683124.

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

It is not a de Polignac number, because 42138662449 - 2⁹ = 42138661937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42138662443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12370189 + ... + 12373594.

It is an arithmetic number, because the mean of its divisors is an integer number (5715814104).

Almost surely, 2^42138662449 is an apocalyptic number.

It is an amenable number.

42138662449 is a deficient number, since it is larger than the sum of its proper divisors (3587850383).

42138662449 is a wasteful number, since it uses less digits than its factorization.

42138662449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24743927.

The product of its digits is 1990656, while the sum is 49.

The spelling of 42138662449 in words is "forty-two billion, one hundred thirty-eight million, six hundred sixty-two thousand, four hundred forty-nine".