1681915435223 has 2 divisors, whose sum is σ = 1681915435224. Its totient is φ = 1681915435222.

The previous prime is 1681915435157. The next prime is 1681915435243. The reversal of 1681915435223 is 3225345191861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1681915435223 - 2³² = 1677620467927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1681915435243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840957717611 + 840957717612.

It is an arithmetic number, because the mean of its divisors is an integer number (840957717612).

Almost surely, 2^{1681915435223} is an apocalyptic number.

1681915435223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681915435223 is an equidigital number, since it uses as much as digits as its factorization.

1681915435223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 50.

The spelling of 1681915435223 in words is "one trillion, six hundred eighty-one billion, nine hundred fifteen million, four hundred thirty-five thousand, two hundred twenty-three".