1816725418903 has 2 divisors, whose sum is σ = 1816725418904. Its totient is φ = 1816725418902.

The previous prime is 1816725418843. The next prime is 1816725418913. The reversal of 1816725418903 is 3098145276181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1816725418903 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816725418913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908362709451 + 908362709452.

It is an arithmetic number, because the mean of its divisors is an integer number (908362709452).

It is a 1-persistent number, because it is pandigital, but 2⋅1816725418903 = 3633450837806 is not.

Almost surely, 2^{1816725418903} is an apocalyptic number.

1816725418903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816725418903 is an equidigital number, since it uses as much as digits as its factorization.

1816725418903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 1816725418903 in words is "one trillion, eight hundred sixteen billion, seven hundred twenty-five million, four hundred eighteen thousand, nine hundred three".