1681112681 has 8 divisors (see below), whose sum is σ = 1692351360. Its totient is φ = 1669888288.

The previous prime is 1681112663. The next prime is 1681112683. The reversal of 1681112681 is 1862111861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1681112681 - 2³⁰ = 607370857 is a prime.

It is a super-2 number, since 2×1681112681² = 5652279692438015522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1681112683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338045 + ... + 342981.

It is an arithmetic number, because the mean of its divisors is an integer number (211543920).

Almost surely, 2^1681112681 is an apocalyptic number.

It is an amenable number.

1681112681 is a deficient number, since it is larger than the sum of its proper divisors (11238679).

1681112681 is a wasteful number, since it uses less digits than its factorization.

1681112681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143.

The product of its digits is 4608, while the sum is 35.

The square root of 1681112681 is about 41001.3741355092. The cubic root of 1681112681 is about 1189.0467806104.

It can be divided in two parts, 16811 and 12681, that added together give a palindrome (29492).

The spelling of 1681112681 in words is "one billion, six hundred eighty-one million, one hundred twelve thousand, six hundred eighty-one".