180831649856 has 112 divisors (see below), whose sum is σ = 432966327360. Its totient is φ = 73822648320.

The previous prime is 180831649853. The next prime is 180831649871. The reversal of 180831649856 is 658946138081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 180831649795 and 180831649804.

It is not an unprimeable number, because it can be changed into a prime (180831649853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71615 + ... + 605633.

It is an arithmetic number, because the mean of its divisors is an integer number (3865770780).

Almost surely, 2^180831649856 is an apocalyptic number.

180831649856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180831649856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216483163680).

180831649856 is an abundant number, since it is smaller than the sum of its proper divisors (252134677504).

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

180831649856 is a wasteful number, since it uses less digits than its factorization.

180831649856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534092 (or 534082 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 180831649856 in words is "one hundred eighty billion, eight hundred thirty-one million, six hundred forty-nine thousand, eight hundred fifty-six".