1680655823 has 8 divisors (see below), whose sum is σ = 2095363200. Its totient is φ = 1309601880.

The previous prime is 1680655813. The next prime is 1680655829. The reversal of 1680655823 is 3285560861.

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

It is a cyclic number.

It is not a de Polignac number, because 1680655823 - 2⁶ = 1680655759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680655829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10913273 + ... + 10913426.

It is an arithmetic number, because the mean of its divisors is an integer number (261920400).

Almost surely, 2^1680655823 is an apocalyptic number.

1680655823 is a deficient number, since it is larger than the sum of its proper divisors (414707377).

1680655823 is a wasteful number, since it uses less digits than its factorization.

1680655823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21826717.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 1680655823 is about 40995.8025046467. The cubic root of 1680655823 is about 1188.9390593460.

The spelling of 1680655823 in words is "one billion, six hundred eighty million, six hundred fifty-five thousand, eight hundred twenty-three".