78755832171 has 16 divisors (see below), whose sum is σ = 117707836320. Its totient is φ = 52039249920.

The previous prime is 78755832161. The next prime is 78755832209. The reversal of 78755832171 is 17123855787.

78755832171 is a `hidden beast` number, since 7 + 87 + 558 + 3 + 2 + 1 + 7 + 1 = 666.

It is not a de Polignac number, because 78755832171 - 2⁵ = 78755832139 is a prime.

It is a super-2 number, since 2×78755832171² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78755832131) 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, 12903510 + ... + 12909611.

It is an arithmetic number, because the mean of its divisors is an integer number (7356739770).

Almost surely, 2^78755832171 is an apocalyptic number.

78755832171 is a deficient number, since it is larger than the sum of its proper divisors (38952004149).

78755832171 is a wasteful number, since it uses less digits than its factorization.

78755832171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25813243 (or 25813237 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 54.

The spelling of 78755832171 in words is "seventy-eight billion, seven hundred fifty-five million, eight hundred thirty-two thousand, one hundred seventy-one".