1680944964 has 24 divisors (see below), whose sum is σ = 3928017408. Its totient is φ = 559484640.

The previous prime is 1680944963. The next prime is 1680944981. The reversal of 1680944964 is 4694490861.

It is a super-2 number, since 2×1680944964² = 5651151943993922592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1680944963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95332 + ... + 111579.

It is an arithmetic number, because the mean of its divisors is an integer number (163667392).

Almost surely, 2^1680944964 is an apocalyptic number.

It is an amenable number.

1680944964 is an abundant number, since it is smaller than the sum of its proper divisors (2247072444).

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

1680944964 is a wasteful number, since it uses less digits than its factorization.

1680944964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207595 (or 207593 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 1680944964 is about 40999.3288237747. The cubic root of 1680944964 is about 1189.0072373576.

The spelling of 1680944964 in words is "one billion, six hundred eighty million, nine hundred forty-four thousand, nine hundred sixty-four".