154894983489 has 27 divisors (see below), whose sum is σ = 237703189737. Its totient is φ = 97176415104.

The previous prime is 154894983443. The next prime is 154894983491. The reversal of 154894983489 is 984389498451.

The square root of 154894983489 is 393567.

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

154894983489 is a `hidden beast` number, since 1 + 54 + 8 + 9 + 4 + 98 + 3 + 489 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12328327089 + 142566656400 = 111033^2 + 377580^2 .

It is not a de Polignac number, because 154894983489 - 2²⁵ = 154861429057 is a prime.

It is a super-2 number, since 2×154894983489² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (154894983499) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20068059 + ... + 20075775.

Almost surely, 2^154894983489 is an apocalyptic number.

154894983489 is the 393567-th square number.

154894983489 is the 196784-th centered octagonal number.

It is an amenable number.

154894983489 is a deficient number, since it is larger than the sum of its proper divisors (82808206248).

154894983489 is an frugal number, since it uses more digits than its factorization.

154894983489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15474 (or 7737 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 72.

The spelling of 154894983489 in words is "one hundred fifty-four billion, eight hundred ninety-four million, nine hundred eighty-three thousand, four hundred eighty-nine".