180201640 has 16 divisors (see below), whose sum is σ = 405453780. Its totient is φ = 72080640.

The previous prime is 180201599. The next prime is 180201641. The reversal of 180201640 is 46102081.

180201640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 166048996 + 14152644 = 12886^2 + 3762^2 .

It is not an unprimeable number, because it can be changed into a prime (180201641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252481 + ... + 2252560.

Almost surely, 2^180201640 is an apocalyptic number.

180201640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180201640 is an abundant number, since it is smaller than the sum of its proper divisors (225252140).

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

180201640 is a wasteful number, since it uses less digits than its factorization.

180201640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505052 (or 4505048 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 180201640 is about 13423.9204407654. The cubic root of 180201640 is about 564.8323725449.

The spelling of 180201640 in words is "one hundred eighty million, two hundred one thousand, six hundred forty".