180720320832 has 84 divisors (see below), whose sum is σ = 537187481376. Its totient is φ = 60240101760.

The previous prime is 180720320831. The next prime is 180720320873. The reversal of 180720320832 is 238023027081.

It is a happy number.

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 (180720320831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5794644 + ... + 5825747.

It is an arithmetic number, because the mean of its divisors is an integer number (6395089064).

Almost surely, 2^180720320832 is an apocalyptic number.

180720320832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

180720320832 is an abundant number, since it is smaller than the sum of its proper divisors (356467160544).

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

180720320832 is an equidigital number, since it uses as much as digits as its factorization.

180720320832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11620418 (or 11620396 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 180720320832 in words is "one hundred eighty billion, seven hundred twenty million, three hundred twenty thousand, eight hundred thirty-two".