1816740440831 has 2 divisors, whose sum is σ = 1816740440832. Its totient is φ = 1816740440830.

The previous prime is 1816740440777. The next prime is 1816740440833. The reversal of 1816740440831 is 1380440476181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1816740440831 is a prime.

It is a super-2 number, since 2×1816740440831² (a number of 25 digits) contains 22 as substring.

Together with 1816740440833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816740440833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908370220415 + 908370220416.

It is an arithmetic number, because the mean of its divisors is an integer number (908370220416).

Almost surely, 2^{1816740440831} is an apocalyptic number.

1816740440831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816740440831 is an equidigital number, since it uses as much as digits as its factorization.

1816740440831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 1816740440831 in words is "one trillion, eight hundred sixteen billion, seven hundred forty million, four hundred forty thousand, eight hundred thirty-one".