1618601904331 has 2 divisors, whose sum is σ = 1618601904332. Its totient is φ = 1618601904330.

The previous prime is 1618601904313. The next prime is 1618601904349. The reversal of 1618601904331 is 1334091068161.

Together with previous prime (1618601904313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1618601904313) and next prime (1618601904349).

It is a cyclic number.

It is not a de Polignac number, because 1618601904331 - 2⁷ = 1618601904203 is a prime.

It is a super-2 number, since 2×1618601904331² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1618601904131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809300952165 + 809300952166.

It is an arithmetic number, because the mean of its divisors is an integer number (809300952166).

Almost surely, 2^{1618601904331} is an apocalyptic number.

1618601904331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618601904331 is an equidigital number, since it uses as much as digits as its factorization.

1618601904331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 1618601904331 in words is "one trillion, six hundred eighteen billion, six hundred one million, nine hundred four thousand, three hundred thirty-one".