189529606561 has 2 divisors, whose sum is σ = 189529606562. Its totient is φ = 189529606560.

The previous prime is 189529606547. The next prime is 189529606577. The reversal of 189529606561 is 165606925981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123398340961 + 66131265600 = 351281^2 + 257160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189529606561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189529606496 and 189529606505.

It is not a weakly prime, because it can be changed into another prime (189529606361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94764803280 + 94764803281.

It is an arithmetic number, because the mean of its divisors is an integer number (94764803281).

Almost surely, 2^189529606561 is an apocalyptic number.

It is an amenable number.

189529606561 is a deficient number, since it is larger than the sum of its proper divisors (1).

189529606561 is an equidigital number, since it uses as much as digits as its factorization.

189529606561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 58.

The spelling of 189529606561 in words is "one hundred eighty-nine billion, five hundred twenty-nine million, six hundred six thousand, five hundred sixty-one".