78179181676 has 6 divisors (see below), whose sum is σ = 136813567940. Its totient is φ = 39089590836.

The previous prime is 78179181673. The next prime is 78179181713. The reversal of 78179181676 is 67618197187.

It is a super-2 number, since 2×78179181676² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78179181673) 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 as a sum of consecutive naturals, namely, 9772397706 + ... + 9772397713.

Almost surely, 2^78179181676 is an apocalyptic number.

It is an amenable number.

78179181676 is a deficient number, since it is larger than the sum of its proper divisors (58634386264).

78179181676 is a wasteful number, since it uses less digits than its factorization.

78179181676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19544795423 (or 19544795421 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 61.

The spelling of 78179181676 in words is "seventy-eight billion, one hundred seventy-nine million, one hundred eighty-one thousand, six hundred seventy-six".