78742326171 has 4 divisors (see below), whose sum is σ = 104989768232. Its totient is φ = 52494884112.

The previous prime is 78742326079. The next prime is 78742326193. The reversal of 78742326171 is 17162324787.

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

It is not a de Polignac number, because 78742326171 - 2⁷ = 78742326043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78742326171.

It is not an unprimeable number, because it can be changed into a prime (78742326071) 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, 13123721026 + ... + 13123721031.

It is an arithmetic number, because the mean of its divisors is an integer number (26247442058).

Almost surely, 2^78742326171 is an apocalyptic number.

78742326171 is a deficient number, since it is larger than the sum of its proper divisors (26247442061).

78742326171 is a wasteful number, since it uses less digits than its factorization.

78742326171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26247442060.

The product of its digits is 790272, while the sum is 48.

The spelling of 78742326171 in words is "seventy-eight billion, seven hundred forty-two million, three hundred twenty-six thousand, one hundred seventy-one".