1601680688 has 20 divisors (see below), whose sum is σ = 3106040040. Its totient is φ = 800121984.

The previous prime is 1601680673. The next prime is 1601680697. The reversal of 1601680688 is 8860861061.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26270 + ... + 62397.

It is an arithmetic number, because the mean of its divisors is an integer number (155302002).

Almost surely, 2^1601680688 is an apocalyptic number.

It is an amenable number.

1601680688 is a deficient number, since it is larger than the sum of its proper divisors (1504359352).

1601680688 is a wasteful number, since it uses less digits than its factorization.

1601680688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89804 (or 89798 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 1601680688 is about 40021.0030858798. The cubic root of 1601680688 is about 1170.0164821016.

The spelling of 1601680688 in words is "one billion, six hundred one million, six hundred eighty thousand, six hundred eighty-eight".