159954403249 has 27 divisors (see below), whose sum is σ = 167377373337. Its totient is φ = 152858214600.

The previous prime is 159954403243. The next prime is 159954403253. The reversal of 159954403249 is 942304459951.

The square root of 159954403249 is 399943.

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

It is not a de Polignac number, because 159954403249 - 2⁹ = 159954402737 is a prime.

It is a super-2 number, since 2×159954403249² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159954403249.

It is not an unprimeable number, because it can be changed into a prime (159954403243) 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, 1221025914 + ... + 1221026044.

Almost surely, 2^159954403249 is an apocalyptic number.

159954403249 is the 399943-rd square number.

159954403249 is the 199972-nd centered octagonal number.

It is an amenable number.

159954403249 is a deficient number, since it is larger than the sum of its proper divisors (7422970088).

159954403249 is an frugal number, since it uses more digits than its factorization.

159954403249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 159954403249 in words is "one hundred fifty-nine billion, nine hundred fifty-four million, four hundred three thousand, two hundred forty-nine".