679647932078 has 4 divisors (see below), whose sum is σ = 1019471898120. Its totient is φ = 339823966038.

The previous prime is 679647932063. The next prime is 679647932087. The reversal of 679647932078 is 870239746976.

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

It is a junction number, because it is equal to n+sod(n) for n = 679647931999 and 679647932017.

It is a congruent number.

It is an unprimeable number.

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, 169911983018 + ... + 169911983021.

It is an arithmetic number, because the mean of its divisors is an integer number (254867974530).

Almost surely, 2^679647932078 is an apocalyptic number.

679647932078 is a deficient number, since it is larger than the sum of its proper divisors (339823966042).

679647932078 is a wasteful number, since it uses less digits than its factorization.

679647932078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339823966041.

The product of its (nonzero) digits is 192036096, while the sum is 68.

The spelling of 679647932078 in words is "six hundred seventy-nine billion, six hundred forty-seven million, nine hundred thirty-two thousand, seventy-eight".