189191946249 has 6 divisors (see below), whose sum is σ = 273277255706. Its totient is φ = 126127964160.

The previous prime is 189191946227. The next prime is 189191946259. The reversal of 189191946249 is 942649191981.

189191946249 is a `hidden beast` number, since 1 + 89 + 1 + 91 + 9 + 462 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128911875849 + 60280070400 = 359043^2 + 245520^2 .

It is not a de Polignac number, because 189191946249 - 2¹² = 189191942153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189191946259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10510663672 + ... + 10510663689.

Almost surely, 2^189191946249 is an apocalyptic number.

It is an amenable number.

189191946249 is a deficient number, since it is larger than the sum of its proper divisors (84085309457).

189191946249 is a wasteful number, since it uses less digits than its factorization.

189191946249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21021327367 (or 21021327364 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 189191946249 in words is "one hundred eighty-nine billion, one hundred ninety-one million, nine hundred forty-six thousand, two hundred forty-nine".