189857133569 has 2 divisors, whose sum is σ = 189857133570. Its totient is φ = 189857133568.

The previous prime is 189857133533. The next prime is 189857133581. The reversal of 189857133569 is 965331758981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104235351025 + 85621782544 = 322855^2 + 292612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189857133569 is a prime.

It is a super-2 number, since 2×189857133569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189857130569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94928566784 + 94928566785.

It is an arithmetic number, because the mean of its divisors is an integer number (94928566785).

Almost surely, 2^189857133569 is an apocalyptic number.

It is an amenable number.

189857133569 is a deficient number, since it is larger than the sum of its proper divisors (1).

189857133569 is an equidigital number, since it uses as much as digits as its factorization.

189857133569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 65.

The spelling of 189857133569 in words is "one hundred eighty-nine billion, eight hundred fifty-seven million, one hundred thirty-three thousand, five hundred sixty-nine".