189144098649 has 135 divisors (see below), whose sum is σ = 326368759717. Its totient is φ = 109074675600.

The previous prime is 189144098639. The next prime is 189144098651. The reversal of 189144098649 is 946890441981.

The square root of 189144098649 is 434907.

It is a perfect power (a square), and thus also a powerful number.

189144098649 is a `hidden beast` number, since 18 + 91 + 440 + 98 + 6 + 4 + 9 = 666.

It is not a de Polignac number, because 189144098649 - 2⁹ = 189144098137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189144098639) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 990283144 + ... + 990283334.

Almost surely, 2^189144098649 is an apocalyptic number.

189144098649 is the 434907-th square number.

189144098649 is the 217454-th centered octagonal number.

It is an amenable number.

189144098649 is a deficient number, since it is larger than the sum of its proper divisors (137224661068).

189144098649 is an equidigital number, since it uses as much as digits as its factorization.

189144098649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 63.

The spelling of 189144098649 in words is "one hundred eighty-nine billion, one hundred forty-four million, ninety-eight thousand, six hundred forty-nine".