180651350961 has 9 divisors (see below), whose sum is σ = 260942682091. Its totient is φ = 120433383912.

The previous prime is 180651350959. The next prime is 180651350989. The reversal of 180651350961 is 169053156081.

The square root of 180651350961 is 425031.

It is a perfect power (a square), and thus also a powerful number.

180651350961 is a `hidden beast` number, since 1 + 80 + 6 + 5 + 1 + 3 + 509 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14060030625 + 166591320336 = 118575^2 + 408156^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 180651350961 - 2¹ = 180651350959 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (180651350161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1204255 + ... + 1345931.

Almost surely, 2^180651350961 is an apocalyptic number.

180651350961 is the 425031-st square number.

180651350961 is the 212516-th centered octagonal number.

It is an amenable number.

180651350961 is a deficient number, since it is larger than the sum of its proper divisors (80291331130).

180651350961 is an frugal number, since it uses more digits than its factorization.

180651350961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283360 (or 141680 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 180651350961 in words is "one hundred eighty billion, six hundred fifty-one million, three hundred fifty thousand, nine hundred sixty-one".