1018158459991 has 2 divisors, whose sum is σ = 1018158459992. Its totient is φ = 1018158459990.

The previous prime is 1018158459971. The next prime is 1018158460019. The reversal of 1018158459991 is 1999548518101.

It is a weak prime.

It is an emirp because it is prime and its reverse (1999548518101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1018158459991 - 2³⁷ = 880719506519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1018158459911) 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, 509079229995 + 509079229996.

It is an arithmetic number, because the mean of its divisors is an integer number (509079229996).

Almost surely, 2^{1018158459991} is an apocalyptic number.

1018158459991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018158459991 is an equidigital number, since it uses as much as digits as its factorization.

1018158459991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 61.

The spelling of 1018158459991 in words is "one trillion, eighteen billion, one hundred fifty-eight million, four hundred fifty-nine thousand, nine hundred ninety-one".