159892018225 has 9 divisors (see below), whose sum is σ = 198268581793. Its totient is φ = 127912015120.

The previous prime is 159892018207. The next prime is 159892018241. The reversal of 159892018225 is 522810298951.

The square root of 159892018225 is 399865.

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 7436130289 + 152455887936 = 86233^2 + 390456^2 .

It is not a de Polignac number, because 159892018225 - 2⁵ = 159892018193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1959339 + ... + 2039311.

Almost surely, 2^159892018225 is an apocalyptic number.

159892018225 is the 399865-th square number.

159892018225 is the 199933-rd centered octagonal number.

It is an amenable number.

159892018225 is a deficient number, since it is larger than the sum of its proper divisors (38376563568).

159892018225 is an frugal number, since it uses more digits than its factorization.

159892018225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159956 (or 79978 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 52.

The spelling of 159892018225 in words is "one hundred fifty-nine billion, eight hundred ninety-two million, eighteen thousand, two hundred twenty-five".