180885961 has 16 divisors (see below), whose sum is σ = 196743168. Its totient is φ = 165805200.

The previous prime is 180885949. The next prime is 180885983. The reversal of 180885961 is 169588081.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180885961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180885941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75106 + ... + 77476.

It is an arithmetic number, because the mean of its divisors is an integer number (12296448).

Almost surely, 2^180885961 is an apocalyptic number.

It is an amenable number.

180885961 is a deficient number, since it is larger than the sum of its proper divisors (15857207).

180885961 is a wasteful number, since it uses less digits than its factorization.

180885961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532.

The product of its (nonzero) digits is 138240, while the sum is 46.

The square root of 180885961 is about 13449.3851532328. The cubic root of 180885961 is about 565.5464585388.

The spelling of 180885961 in words is "one hundred eighty million, eight hundred eighty-five thousand, nine hundred sixty-one".