180816885 has 48 divisors (see below), whose sum is σ = 327075840. Its totient is φ = 92292480.

The previous prime is 180816877. The next prime is 180816949. The reversal of 180816885 is 588618081.

It is a happy number.

It is not a de Polignac number, because 180816885 - 2³ = 180816877 is a prime.

It is a super-2 number, since 2×180816885² = 65389491802206450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 180816885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165190 + ... + 166280.

It is an arithmetic number, because the mean of its divisors is an integer number (6814080).

Almost surely, 2^180816885 is an apocalyptic number.

180816885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

180816885 is a deficient number, since it is larger than the sum of its proper divisors (146258955).

180816885 is a wasteful number, since it uses less digits than its factorization.

180816885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 45.

The square root of 180816885 is about 13446.8169095887. The cubic root of 180816885 is about 565.4744598409.

The spelling of 180816885 in words is "one hundred eighty million, eight hundred sixteen thousand, eight hundred eighty-five".