78869109171 has 32 divisors (see below), whose sum is σ = 111831390720. Its totient is φ = 49270500864.

The previous prime is 78869109139. The next prime is 78869109211. The reversal of 78869109171 is 17190196887.

It is not a de Polignac number, because 78869109171 - 2⁵ = 78869109139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78869109071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22158690 + ... + 22162248.

It is an arithmetic number, because the mean of its divisors is an integer number (3494730960).

Almost surely, 2^78869109171 is an apocalyptic number.

78869109171 is a deficient number, since it is larger than the sum of its proper divisors (32962281549).

78869109171 is a wasteful number, since it uses less digits than its factorization.

78869109171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355.

The product of its (nonzero) digits is 1524096, while the sum is 57.

The spelling of 78869109171 in words is "seventy-eight billion, eight hundred sixty-nine million, one hundred nine thousand, one hundred seventy-one".