78942165173 has 8 divisors (see below), whose sum is σ = 82384769088. Its totient is φ = 75500422624.

The previous prime is 78942165119. The next prime is 78942165187. The reversal of 78942165173 is 37156124987.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78942165173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78942165193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24440 + ... + 398097.

It is an arithmetic number, because the mean of its divisors is an integer number (10298096136).

Almost surely, 2^78942165173 is an apocalyptic number.

It is an amenable number.

78942165173 is a deficient number, since it is larger than the sum of its proper divisors (3442603915).

78942165173 is a wasteful number, since it uses less digits than its factorization.

78942165173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430683.

The product of its digits is 2540160, while the sum is 53.

The spelling of 78942165173 in words is "seventy-eight billion, nine hundred forty-two million, one hundred sixty-five thousand, one hundred seventy-three".