181716018012 has 36 divisors (see below), whose sum is σ = 483513383080. Its totient is φ = 57384005472.

The previous prime is 181716017999. The next prime is 181716018017. The reversal of 181716018012 is 210810617181.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×181716018012³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181716018017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132832663 + ... + 132834030.

Almost surely, 2^181716018012 is an apocalyptic number.

181716018012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181716018012 is an abundant number, since it is smaller than the sum of its proper divisors (301797365068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181716018012 is a wasteful number, since it uses less digits than its factorization.

181716018012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265666722 (or 265666717 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 36.

The spelling of 181716018012 in words is "one hundred eighty-one billion, seven hundred sixteen million, eighteen thousand, twelve".