1681101688 has 16 divisors (see below), whose sum is σ = 3602360880. Its totient is φ = 720472128.

The previous prime is 1681101629. The next prime is 1681101689. The reversal of 1681101688 is 8861011861.

It is a super-2 number, since 2×1681101688² = 5652205770792898688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1681101688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681101689) 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, 15009781 + ... + 15009892.

It is an arithmetic number, because the mean of its divisors is an integer number (225147555).

Almost surely, 2^1681101688 is an apocalyptic number.

It is an amenable number.

1681101688 is an abundant number, since it is smaller than the sum of its proper divisors (1921259192).

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

1681101688 is a wasteful number, since it uses less digits than its factorization.

1681101688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30019686 (or 30019682 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 1681101688 is about 41001.2400788074. The cubic root of 1681101688 is about 1189.0441888309.

The spelling of 1681101688 in words is "one billion, six hundred eighty-one million, one hundred one thousand, six hundred eighty-eight".