83771881078085 has 16 divisors (see below), whose sum is σ = 103173016075200. Its totient is φ = 65275476790656.

The previous prime is 83771881078069. The next prime is 83771881078087. The reversal of 83771881078085 is 58087018817738.

It is a cyclic number.

It is not a de Polignac number, because 83771881078085 - 2⁴ = 83771881078069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83771881078087) 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, 1404831515 + ... + 1404891144.

It is an arithmetic number, because the mean of its divisors is an integer number (6448313504700).

Almost surely, 2^{83771881078085} is an apocalyptic number.

It is an amenable number.

83771881078085 is a deficient number, since it is larger than the sum of its proper divisors (19401134997115).

83771881078085 is a wasteful number, since it uses less digits than its factorization.

83771881078085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809722820.

The product of its (nonzero) digits is 168591360, while the sum is 71.

The spelling of 83771881078085 in words is "eighty-three trillion, seven hundred seventy-one billion, eight hundred eighty-one million, seventy-eight thousand, eighty-five".