78328904179 has 4 divisors (see below), whose sum is σ = 78626732976. Its totient is φ = 78031075384.

The previous prime is 78328904123. The next prime is 78328904197. The reversal of 78328904179 is 97140982387.

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

It is a cyclic number.

It is not a de Polignac number, because 78328904179 - 2⁷ = 78328904051 is a prime.

It is a super-2 number, since 2×78328904179² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78328908179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148914004 + ... + 148914529.

It is an arithmetic number, because the mean of its divisors is an integer number (19656683244).

Almost surely, 2^78328904179 is an apocalyptic number.

78328904179 is a deficient number, since it is larger than the sum of its proper divisors (297828797).

78328904179 is a wasteful number, since it uses less digits than its factorization.

78328904179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297828796.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 78328904179 in words is "seventy-eight billion, three hundred twenty-eight million, nine hundred four thousand, one hundred seventy-nine".