679599918854 has 4 divisors (see below), whose sum is σ = 1019399878284. Its totient is φ = 339799959426.

The previous prime is 679599918841. The next prime is 679599918859. The reversal of 679599918854 is 458819995976.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679599918859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169899979712 + ... + 169899979715.

It is an arithmetic number, because the mean of its divisors is an integer number (254849969571).

Almost surely, 2^679599918854 is an apocalyptic number.

679599918854 is a deficient number, since it is larger than the sum of its proper divisors (339799959430).

679599918854 is a wasteful number, since it uses less digits than its factorization.

679599918854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339799959429.

The product of its digits is 1763596800, while the sum is 80.

The spelling of 679599918854 in words is "six hundred seventy-nine billion, five hundred ninety-nine million, nine hundred eighteen thousand, eight hundred fifty-four".