42985191017 has 4 divisors (see below), whose sum is σ = 43323657216. Its totient is φ = 42646724820.

The previous prime is 42985190977. The next prime is 42985191023. The reversal of 42985191017 is 71019158924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42985191017 - 2²⁰ = 42984142441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42985191047) 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 in 3 ways as a sum of consecutive naturals, for example, 169232909 + ... + 169233162.

It is an arithmetic number, because the mean of its divisors is an integer number (10830914304).

Almost surely, 2^42985191017 is an apocalyptic number.

It is an amenable number.

42985191017 is a deficient number, since it is larger than the sum of its proper divisors (338466199).

42985191017 is a wasteful number, since it uses less digits than its factorization.

42985191017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338466198.

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 42985191017 in words is "forty-two billion, nine hundred eighty-five million, one hundred ninety-one thousand, seventeen".