154839889009 has 9 divisors (see below), whose sum is σ = 167672401473. Its totient is φ = 142924406352.

The previous prime is 154839889007. The next prime is 154839889033. The reversal of 154839889009 is 900988938451.

The square root of 154839889009 is 393497.

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

It can be written as a sum of positive squares in 4 ways, for example, as 177023025 + 154662865984 = 13305^2 + 393272^2 .

It is not a de Polignac number, because 154839889009 - 2¹ = 154839889007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154839889007) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5100327 + ... + 5130595.

Almost surely, 2^154839889009 is an apocalyptic number.

154839889009 is the 393497-th square number.

154839889009 is the 196749-th centered octagonal number.

It is an amenable number.

154839889009 is a deficient number, since it is larger than the sum of its proper divisors (12832512464).

154839889009 is an frugal number, since it uses more digits than its factorization.

154839889009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60564 (or 30282 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 64.

Multiplying 154839889009 by its sum of digits (64), we get a square (9909752896576 = 3147976²).

The spelling of 154839889009 in words is "one hundred fifty-four billion, eight hundred thirty-nine million, eight hundred eighty-nine thousand, nine".