679450439858544 has 80 divisors (see below), whose sum is σ = 1950453200877600. Its totient is φ = 226462717223424.

The previous prime is 679450439858537. The next prime is 679450439858629. The reversal of 679450439858544 is 445858934054976.

679450439858544 is a `hidden beast` number, since 6 + 7 + 9 + 4 + 50 + 439 + 85 + 8 + 54 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67374669 + ... + 76800044.

It is an arithmetic number, because the mean of its divisors is an integer number (24380665010970).

Almost surely, 2^{679450439858544} is an apocalyptic number.

It is an amenable number.

679450439858544 is an abundant number, since it is smaller than the sum of its proper divisors (1271002761019056).

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

679450439858544 is a wasteful number, since it uses less digits than its factorization.

679450439858544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144185639 (or 144185627 counting only the distinct ones).

The product of its (nonzero) digits is 20901888000, while the sum is 81.

The spelling of 679450439858544 in words is "six hundred seventy-nine trillion, four hundred fifty billion, four hundred thirty-nine million, eight hundred fifty-eight thousand, five hundred forty-four".