679220581784 has 16 divisors (see below), whose sum is σ = 1273594865400. Its totient is φ = 339595284352.

The previous prime is 679220581729. The next prime is 679220581811. The reversal of 679220581784 is 487185022976.

It is a super-2 number, since 2×679220581784² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1682282 + ... + 2046585.

Almost surely, 2^679220581784 is an apocalyptic number.

It is an amenable number.

679220581784 is a deficient number, since it is larger than the sum of its proper divisors (594374283616).

679220581784 is a wasteful number, since it uses less digits than its factorization.

679220581784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751642 (or 3751638 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 679220581784 in words is "six hundred seventy-nine billion, two hundred twenty million, five hundred eighty-one thousand, seven hundred eighty-four".