180978867 has 18 divisors (see below), whose sum is σ = 271410412. Its totient is φ = 120512772.

The previous prime is 180978841. The next prime is 180978869. The reversal of 180978867 is 768879081.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 180978867 - 2²³ = 172590259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180978869) 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 17 ways as a sum of consecutive naturals, for example, 209278 + ... + 210140.

Almost surely, 2^180978867 is an apocalyptic number.

180978867 is a deficient number, since it is larger than the sum of its proper divisors (90431545).

180978867 is an frugal number, since it uses more digits than its factorization.

180978867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The square root of 180978867 is about 13452.8386223875. The cubic root of 180978867 is about 565.6432666160.

Multiplying 180978867 by its product of nonzero digits (1354752), we get a square (245181482025984 = 15658272²).

The spelling of 180978867 in words is "one hundred eighty million, nine hundred seventy-eight thousand, eight hundred sixty-seven".