1680016961696 has 24 divisors (see below), whose sum is σ = 3388204942164. Its totient is φ = 819520468480.

The previous prime is 1680016961681. The next prime is 1680016961699. The reversal of 1680016961696 is 6961696100861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1675523136400 + 4493825296 = 1294420^2 + 67036^2 .

It is not an unprimeable number, because it can be changed into a prime (1680016961699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640249055 + ... + 640251678.

Almost surely, 2^{1680016961696} is an apocalyptic number.

1680016961696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1680016961696 is an abundant number, since it is smaller than the sum of its proper divisors (1708187980468).

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

1680016961696 is a wasteful number, since it uses less digits than its factorization.

1680016961696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280500784 (or 1280500776 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 1680016961696 in words is "one trillion, six hundred eighty billion, sixteen million, nine hundred sixty-one thousand, six hundred ninety-six".