180561401 has 2 divisors, whose sum is σ = 180561402. Its totient is φ = 180561400.

The previous prime is 180561397. The next prime is 180561413. The reversal of 180561401 is 104165081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94090000 + 86471401 = 9700^2 + 9299^2 .

It is a cyclic number.

It is not a de Polignac number, because 180561401 - 2² = 180561397 is a prime.

It is not a weakly prime, because it can be changed into another prime (180561481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90280700 + 90280701.

It is an arithmetic number, because the mean of its divisors is an integer number (90280701).

Almost surely, 2^180561401 is an apocalyptic number.

It is an amenable number.

180561401 is a deficient number, since it is larger than the sum of its proper divisors (1).

180561401 is an equidigital number, since it uses as much as digits as its factorization.

180561401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 180561401 is about 13437.3137568489. The cubic root of 180561401 is about 565.2080065303.

The spelling of 180561401 in words is "one hundred eighty million, five hundred sixty-one thousand, four hundred one".