42489983917 has 16 divisors (see below), whose sum is σ = 45712650240. Its totient is φ = 39367256688.

The previous prime is 42489983909. The next prime is 42489983929. The reversal of 42489983917 is 71938998424.

It is a cyclic number.

It is not a de Polignac number, because 42489983917 - 2³ = 42489983909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42489983717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203328 + ... + 1238134.

It is an arithmetic number, because the mean of its divisors is an integer number (2857040640).

Almost surely, 2^42489983917 is an apocalyptic number.

42489983917 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

42489983917 is a deficient number, since it is larger than the sum of its proper divisors (3222666323).

42489983917 is a wasteful number, since it uses less digits than its factorization.

42489983917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36240.

The product of its digits is 31352832, while the sum is 64.

The spelling of 42489983917 in words is "forty-two billion, four hundred eighty-nine million, nine hundred eighty-three thousand, nine hundred seventeen".