159965601849 has 9 divisors (see below), whose sum is σ = 231063158053. Its totient is φ = 106642934652.

The previous prime is 159965601847. The next prime is 159965601853. The reversal of 159965601849 is 948106569951.

The square root of 159965601849 is 399957.

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

159965601849 is a `hidden beast` number, since 1 + 59 + 9 + 6 + 560 + 18 + 4 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 159965601849 - 2¹ = 159965601847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159965601847) 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, 1133212 + ... + 1266530.

Almost surely, 2^159965601849 is an apocalyptic number.

159965601849 is the 399957-th square number.

159965601849 is the 199979-th centered octagonal number.

It is an amenable number.

159965601849 is a deficient number, since it is larger than the sum of its proper divisors (71097556204).

159965601849 is an frugal number, since it uses more digits than its factorization.

159965601849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266644 (or 133322 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 63.

The spelling of 159965601849 in words is "one hundred fifty-nine billion, nine hundred sixty-five million, six hundred one thousand, eight hundred forty-nine".