180181801836 has 96 divisors (see below), whose sum is σ = 484514573760. Its totient is φ = 57858624000.

The previous prime is 180181801831. The next prime is 180181801841. The reversal of 180181801836 is 638108181081.

It is an interprime number because it is at equal distance from previous prime (180181801831) and next prime (180181801841).

It is a junction number, because it is equal to n+sod(n) for n = 180181801791 and 180181801800.

It is not an unprimeable number, because it can be changed into a prime (180181801831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180376 + ... + 626816.

It is an arithmetic number, because the mean of its divisors is an integer number (5047026810).

Almost surely, 2^180181801836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180181801836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242257286880).

180181801836 is an abundant number, since it is smaller than the sum of its proper divisors (304332771924).

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

180181801836 is a wasteful number, since it uses less digits than its factorization.

180181801836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446592 (or 446584 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 180181801836 in words is "one hundred eighty billion, one hundred eighty-one million, eight hundred one thousand, eight hundred thirty-six".