1818000261686 has 16 divisors (see below), whose sum is σ = 3116659640064. Its totient is φ = 779121028584.

The previous prime is 1818000261641. The next prime is 1818000261731. The reversal of 1818000261686 is 6861620008181.

It is an interprime number because it is at equal distance from previous prime (1818000261641) and next prime (1818000261731).

It is a self number, because there is not a number n which added to its sum of digits gives 1818000261686.

It is a congruent number.

It is an unprimeable number.

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, 1308380 + ... + 2312543.

It is an arithmetic number, because the mean of its divisors is an integer number (194791227504).

Almost surely, 2^{1818000261686} is an apocalyptic number.

1818000261686 is a deficient number, since it is larger than the sum of its proper divisors (1298659378378).

1818000261686 is a wasteful number, since it uses less digits than its factorization.

1818000261686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656795.

The product of its (nonzero) digits is 221184, while the sum is 47.

The spelling of 1818000261686 in words is "one trillion, eight hundred eighteen billion, two hundred sixty-one thousand, six hundred eighty-six".