1816645185118 has 8 divisors (see below), whose sum is σ = 2843444637648. Its totient is φ = 868830305904.

The previous prime is 1816645185077. The next prime is 1816645185169. The reversal of 1816645185118 is 8115815466181.

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

It is a super-2 number, since 2×1816645185118² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19746143271 + ... + 19746143362.

It is an arithmetic number, because the mean of its divisors is an integer number (355430579706).

Almost surely, 2^{1816645185118} is an apocalyptic number.

1816645185118 is a deficient number, since it is larger than the sum of its proper divisors (1026799452530).

1816645185118 is a wasteful number, since it uses less digits than its factorization.

1816645185118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39492286658.

The product of its digits is 1843200, while the sum is 55.

The spelling of 1816645185118 in words is "one trillion, eight hundred sixteen billion, six hundred forty-five million, one hundred eighty-five thousand, one hundred eighteen".