149611919209 has 9 divisors (see below), whose sum is σ = 150513503301. Its totient is φ = 148715710560.

The previous prime is 149611919207. The next prime is 149611919239. The reversal of 149611919209 is 902919116941.

The square root of 149611919209 is 386797.

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

149611919209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 134832168025 + 14779751184 = 367195^2 + 121572^2 .

It is not a de Polignac number, because 149611919209 - 2¹ = 149611919207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149611919207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70009189 + ... + 70011325.

It is an arithmetic number, because the mean of its divisors is an integer number (16723722589).

Almost surely, 2^149611919209 is an apocalyptic number.

149611919209 is the 386797-th square number.

149611919209 is the 193399-th centered octagonal number.

It is an amenable number.

149611919209 is a deficient number, since it is larger than the sum of its proper divisors (901584092).

149611919209 is an frugal number, since it uses more digits than its factorization.

149611919209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 52.

The spelling of 149611919209 in words is "one hundred forty-nine billion, six hundred eleven million, nine hundred nineteen thousand, two hundred nine".