180820055 has 32 divisors (see below), whose sum is σ = 253962240. Its totient is φ = 122394240.

The previous prime is 180820039. The next prime is 180820061. The reversal of 180820055 is 550028081.

180820055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 180820055 - 2⁴ = 180820039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35924 + ... + 40646.

It is an arithmetic number, because the mean of its divisors is an integer number (7936320).

Almost surely, 2^180820055 is an apocalyptic number.

180820055 is a deficient number, since it is larger than the sum of its proper divisors (73142185).

180820055 is a wasteful number, since it uses less digits than its factorization.

180820055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 180820055 is about 13446.9347808339. The cubic root of 180820055 is about 565.4777643692.

The spelling of 180820055 in words is "one hundred eighty million, eight hundred twenty thousand, fifty-five".