159998645 has 16 divisors (see below), whose sum is σ = 205316208. Its totient is φ = 119270400.

The previous prime is 159998627. The next prime is 159998647. The reversal of 159998645 is 546899951.

It can be written as a sum of positive squares in 8 ways, for example, as 1444 + 159997201 = 38^2 + 12649^2 .

It is not a de Polignac number, because 159998645 - 2¹⁸ = 159736501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159998647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734 + ... + 17903.

It is an arithmetic number, because the mean of its divisors is an integer number (12832263).

Almost surely, 2^159998645 is an apocalyptic number.

It is an amenable number.

159998645 is a deficient number, since it is larger than the sum of its proper divisors (45317563).

159998645 is a wasteful number, since it uses less digits than its factorization.

159998645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18760.

The product of its digits is 3499200, while the sum is 56.

The square root of 159998645 is about 12649.0570794822. The cubic root of 159998645 is about 542.8819907997.

The spelling of 159998645 in words is "one hundred fifty-nine million, nine hundred ninety-eight thousand, six hundred forty-five".