42117989113 has 4 divisors (see below), whose sum is σ = 42120384628. Its totient is φ = 42115593600.

The previous prime is 42117989087. The next prime is 42117989159. The reversal of 42117989113 is 31198971124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38877191929 + 3240797184 = 197173^2 + 56928^2 .

It is a cyclic number.

It is not a de Polignac number, because 42117989113 - 2²⁵ = 42084434681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42117989713) 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, 1171188 + ... + 1206613.

It is an arithmetic number, because the mean of its divisors is an integer number (10530096157).

Almost surely, 2^42117989113 is an apocalyptic number.

It is an amenable number.

42117989113 is a deficient number, since it is larger than the sum of its proper divisors (2395515).

42117989113 is a wasteful number, since it uses less digits than its factorization.

42117989113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395514.

The product of its digits is 108864, while the sum is 46.

The spelling of 42117989113 in words is "forty-two billion, one hundred seventeen million, nine hundred eighty-nine thousand, one hundred thirteen".