679443646442 has 48 divisors (see below), whose sum is σ = 1209304792800. Its totient is φ = 283145047200.

The previous prime is 679443646397. The next prime is 679443646463. The reversal of 679443646442 is 244646344976.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444017 + ... + 1247412.

It is an arithmetic number, because the mean of its divisors is an integer number (25193849850).

Almost surely, 2^679443646442 is an apocalyptic number.

679443646442 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

679443646442 is a deficient number, since it is larger than the sum of its proper divisors (529861146358).

679443646442 is a wasteful number, since it uses less digits than its factorization.

679443646442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691523 (or 1691492 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 59.

The spelling of 679443646442 in words is "six hundred seventy-nine billion, four hundred forty-three million, six hundred forty-six thousand, four hundred forty-two".