1608961681768 has 32 divisors (see below), whose sum is σ = 3531867111360. Its totient is φ = 672736590720.

The previous prime is 1608961681681. The next prime is 1608961681777. The reversal of 1608961681768 is 8671861698061.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350381346 + ... + 350385937.

It is an arithmetic number, because the mean of its divisors is an integer number (110370847230).

Almost surely, 2^{1608961681768} is an apocalyptic number.

It is an amenable number.

1608961681768 is an abundant number, since it is smaller than the sum of its proper divisors (1922905429592).

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

1608961681768 is a wasteful number, since it uses less digits than its factorization.

1608961681768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700767337 (or 700767333 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 67.

The spelling of 1608961681768 in words is "one trillion, six hundred eight billion, nine hundred sixty-one million, six hundred eighty-one thousand, seven hundred sixty-eight".