189776485361 has 4 divisors (see below), whose sum is σ = 190739817972. Its totient is φ = 188813152752.

The previous prime is 189776485337. The next prime is 189776485399. The reversal of 189776485361 is 163584677981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180247797136 + 9528688225 = 424556^2 + 97615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189776485361 is a prime.

It is a super-2 number, since 2×189776485361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189776485331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481666010 + ... + 481666403.

It is an arithmetic number, because the mean of its divisors is an integer number (47684954493).

Almost surely, 2^189776485361 is an apocalyptic number.

It is an amenable number.

189776485361 is a deficient number, since it is larger than the sum of its proper divisors (963332611).

189776485361 is an equidigital number, since it uses as much as digits as its factorization.

189776485361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963332610.

The product of its digits is 60963840, while the sum is 65.

The spelling of 189776485361 in words is "one hundred eighty-nine billion, seven hundred seventy-six million, four hundred eighty-five thousand, three hundred sixty-one".