1816616198085 has 128 divisors (see below), whose sum is σ = 3288285020160. Its totient is φ = 850148275200.

The previous prime is 1816616198081. The next prime is 1816616198087. The reversal of 1816616198085 is 5808916166181.

It is not a de Polignac number, because 1816616198085 - 2² = 1816616198081 is a prime.

It is a super-2 number, since 2×1816616198085² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816616198081) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 332041900 + ... + 332047370.

It is an arithmetic number, because the mean of its divisors is an integer number (25689726720).

Almost surely, 2^{1816616198085} is an apocalyptic number.

1816616198085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1816616198085 is a deficient number, since it is larger than the sum of its proper divisors (1471668822075).

1816616198085 is a wasteful number, since it uses less digits than its factorization.

1816616198085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6419.

The product of its (nonzero) digits is 4976640, while the sum is 60.

The spelling of 1816616198085 in words is "one trillion, eight hundred sixteen billion, six hundred sixteen million, one hundred ninety-eight thousand, eighty-five".