42009815873 has 8 divisors (see below), whose sum is σ = 43182105600. Its totient is φ = 40839467760.

The previous prime is 42009815839. The next prime is 42009815893. The reversal of 42009815873 is 37851890024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42009815873 - 2²² = 42005621569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42009815893) 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, 441473 + ... + 528126.

It is an arithmetic number, because the mean of its divisors is an integer number (5397763200).

Almost surely, 2^42009815873 is an apocalyptic number.

It is an amenable number.

42009815873 is a deficient number, since it is larger than the sum of its proper divisors (1172289727).

42009815873 is a wasteful number, since it uses less digits than its factorization.

42009815873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970807.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 42009815873 in words is "forty-two billion, nine million, eight hundred fifteen thousand, eight hundred seventy-three".