1681885229326 has 4 divisors (see below), whose sum is σ = 2522827843992. Its totient is φ = 840942614662.

The previous prime is 1681885229317. The next prime is 1681885229329. The reversal of 1681885229326 is 6239225881861.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1681885229326² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681885229329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420471307330 + ... + 420471307333.

It is an arithmetic number, because the mean of its divisors is an integer number (630706960998).

Almost surely, 2^{1681885229326} is an apocalyptic number.

1681885229326 is a deficient number, since it is larger than the sum of its proper divisors (840942614666).

1681885229326 is an equidigital number, since it uses as much as digits as its factorization.

1681885229326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840942614665.

The product of its digits is 19906560, while the sum is 61.

The spelling of 1681885229326 in words is "one trillion, six hundred eighty-one billion, eight hundred eighty-five million, two hundred twenty-nine thousand, three hundred twenty-six".