83117730875181 has 4 divisors (see below), whose sum is σ = 110823641166912. Its totient is φ = 55411820583452.

The previous prime is 83117730875129. The next prime is 83117730875191. The reversal of 83117730875181 is 18157803771138.

It is a happy number.

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 83117730875181 - 2¹⁷ = 83117730744109 is a prime.

It is a super-2 number, since 2×83117730875181² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83117730875191) 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, 13852955145861 + ... + 13852955145866.

It is an arithmetic number, because the mean of its divisors is an integer number (27705910291728).

Almost surely, 2^{83117730875181} is an apocalyptic number.

It is an amenable number.

83117730875181 is a deficient number, since it is larger than the sum of its proper divisors (27705910291731).

83117730875181 is a wasteful number, since it uses less digits than its factorization.

83117730875181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27705910291730.

The product of its (nonzero) digits is 7902720, while the sum is 60.

The spelling of 83117730875181 in words is "eighty-three trillion, one hundred seventeen billion, seven hundred thirty million, eight hundred seventy-five thousand, one hundred eighty-one".