1816025481659 has 2 divisors, whose sum is σ = 1816025481660. Its totient is φ = 1816025481658.

The previous prime is 1816025481653. The next prime is 1816025481667. The reversal of 1816025481659 is 9561845206181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1816025481659 - 2²⁸ = 1815757046203 is a prime.

It is not a weakly prime, because it can be changed into another prime (1816025481653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908012740829 + 908012740830.

It is an arithmetic number, because the mean of its divisors is an integer number (908012740830).

Almost surely, 2^{1816025481659} is an apocalyptic number.

1816025481659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816025481659 is an equidigital number, since it uses as much as digits as its factorization.

1816025481659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 56.

The spelling of 1816025481659 in words is "one trillion, eight hundred sixteen billion, twenty-five million, four hundred eighty-one thousand, six hundred fifty-nine".