189276561017 has 2 divisors, whose sum is σ = 189276561018. Its totient is φ = 189276561016.

The previous prime is 189276560983. The next prime is 189276561053. The reversal of 189276561017 is 710165672981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173992431376 + 15284129641 = 417124^2 + 123629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189276561017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189276561017.

It is not a weakly prime, because it can be changed into another prime (189276551017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94638280508 + 94638280509.

It is an arithmetic number, because the mean of its divisors is an integer number (94638280509).

Almost surely, 2^189276561017 is an apocalyptic number.

It is an amenable number.

189276561017 is a deficient number, since it is larger than the sum of its proper divisors (1).

189276561017 is an equidigital number, since it uses as much as digits as its factorization.

189276561017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 189276561017 in words is "one hundred eighty-nine billion, two hundred seventy-six million, five hundred sixty-one thousand, seventeen".