1018917126689 has 8 divisors (see below), whose sum is σ = 1270338235968. Its totient is φ = 793961397360.

The previous prime is 1018917126589. The next prime is 1018917126709. The reversal of 1018917126689 is 9866217198101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018917126689 is a prime.

It is a super-2 number, since 2×1018917126689² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018917126589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6616344902 + ... + 6616345055.

It is an arithmetic number, because the mean of its divisors is an integer number (158792279496).

Almost surely, 2^{1018917126689} is an apocalyptic number.

It is an amenable number.

1018917126689 is a deficient number, since it is larger than the sum of its proper divisors (251421109279).

1018917126689 is a wasteful number, since it uses less digits than its factorization.

1018917126689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13232689975.

The product of its (nonzero) digits is 2612736, while the sum is 59.

The spelling of 1018917126689 in words is "one trillion, eighteen billion, nine hundred seventeen million, one hundred twenty-six thousand, six hundred eighty-nine".