679549591680 has 64 divisors (see below), whose sum is σ = 2166064329600. Its totient is φ = 181213223936.

The previous prime is 679549591663. The next prime is 679549591717. The reversal of 679549591680 is 86195945976.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176964120 + ... + 176967959.

It is an arithmetic number, because the mean of its divisors is an integer number (33844755150).

Almost surely, 2^679549591680 is an apocalyptic number.

679549591680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

679549591680 is an abundant number, since it is smaller than the sum of its proper divisors (1486514737920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679549591680 is a wasteful number, since it uses less digits than its factorization.

679549591680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353932101 (or 353932089 counting only the distinct ones).

The product of its (nonzero) digits is 146966400, while the sum is 69.

The spelling of 679549591680 in words is "six hundred seventy-nine billion, five hundred forty-nine million, five hundred ninety-one thousand, six hundred eighty".