1681696009768 has 32 divisors (see below), whose sum is σ = 3370525421760. Its totient is φ = 784672577920.

The previous prime is 1681696009751. The next prime is 1681696009769. The reversal of 1681696009768 is 8679006961861.

It is a super-2 number, since 2×1681696009768² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1681696009769) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 111451630 + ... + 111466717.

It is an arithmetic number, because the mean of its divisors is an integer number (105328919430).

Almost surely, 2^{1681696009768} is an apocalyptic number.

It is an amenable number.

1681696009768 is an abundant number, since it is smaller than the sum of its proper divisors (1688829411992).

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

1681696009768 is a wasteful number, since it uses less digits than its factorization.

1681696009768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222918417 (or 222918413 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 1681696009768 in words is "one trillion, six hundred eighty-one billion, six hundred ninety-six million, nine thousand, seven hundred sixty-eight".