78479679287 has 4 divisors (see below), whose sum is σ = 81891839280. Its totient is φ = 75067519296.

The previous prime is 78479679283. The next prime is 78479679307. The reversal of 78479679287 is 78297697487.

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 78479679287 - 2² = 78479679283 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 (78479679283) 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, 1706079962 + ... + 1706080007.

It is an arithmetic number, because the mean of its divisors is an integer number (20472959820).

Almost surely, 2^78479679287 is an apocalyptic number.

78479679287 is a deficient number, since it is larger than the sum of its proper divisors (3412159993).

78479679287 is a wasteful number, since it uses less digits than its factorization.

78479679287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412159992.

The product of its digits is 597445632, while the sum is 74.

The spelling of 78479679287 in words is "seventy-eight billion, four hundred seventy-nine million, six hundred seventy-nine thousand, two hundred eighty-seven".