1679405806708 has 72 divisors (see below), whose sum is σ = 3466381099272. Its totient is φ = 709730574336.

The previous prime is 1679405806679. The next prime is 1679405806709. The reversal of 1679405806708 is 8076085049761.

It can be written as a sum of positive squares in 4 ways, for example, as 57863340304 + 1621542466404 = 240548^2 + 1273398^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679405806709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85165666 + ... + 85185382.

Almost surely, 2^{1679405806708} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1679405806708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1733190549636).

1679405806708 is an abundant number, since it is smaller than the sum of its proper divisors (1786975292564).

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

1679405806708 is a wasteful number, since it uses less digits than its factorization.

1679405806708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25761 (or 25752 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 1679405806708 in words is "one trillion, six hundred seventy-nine billion, four hundred five million, eight hundred six thousand, seven hundred eight".