78081702171 has 8 divisors (see below), whose sum is σ = 113573385024. Its totient is φ = 47322243720.

The previous prime is 78081702169. The next prime is 78081702173. The reversal of 78081702171 is 17120718087.

It is an interprime number because it is at equal distance from previous prime (78081702169) and next prime (78081702173).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78081702171 - 2¹ = 78081702169 is a prime.

It is a super-2 number, since 2×78081702171² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78081702173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183056061 + ... + 1183056126.

It is an arithmetic number, because the mean of its divisors is an integer number (14196673128).

Almost surely, 2^78081702171 is an apocalyptic number.

78081702171 is a deficient number, since it is larger than the sum of its proper divisors (35491682853).

78081702171 is a wasteful number, since it uses less digits than its factorization.

78081702171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366112201.

The product of its (nonzero) digits is 43904, while the sum is 42.

The spelling of 78081702171 in words is "seventy-eight billion, eighty-one million, seven hundred two thousand, one hundred seventy-one".