1680556322 has 8 divisors (see below), whose sum is σ = 2607759900. Its totient is φ = 811303024.

The previous prime is 1680556313. The next prime is 1680556337. The reversal of 1680556322 is 2236550861.

It can be written as a sum of positive squares in 2 ways, for example, as 1604883721 + 75672601 = 40061^2 + 8699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14487497 + ... + 14487612.

Almost surely, 2^1680556322 is an apocalyptic number.

1680556322 is a deficient number, since it is larger than the sum of its proper divisors (927203578).

1680556322 is a wasteful number, since it uses less digits than its factorization.

1680556322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28975140.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 1680556322 is about 40994.5889356144. The cubic root of 1680556322 is about 1188.9155956960.

The spelling of 1680556322 in words is "one billion, six hundred eighty million, five hundred fifty-six thousand, three hundred twenty-two".