159645796249 has 3 divisors (see below), whose sum is σ = 159646195807. Its totient is φ = 159645396692.

The previous prime is 159645796229. The next prime is 159645796267. The reversal of 159645796249 is 942697546951.

The square root of 159645796249 is 399557.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 25640015625 + 134005780624 = 160125^2 + 366068^2 .

It is not a de Polignac number, because 159645796249 - 2⁵ = 159645796217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159645796229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 199779 + ... + 599335.

Almost surely, 2^159645796249 is an apocalyptic number.

159645796249 is the 399557-th square number.

159645796249 is the 199779-th centered octagonal number.

It is an amenable number.

159645796249 is a deficient number, since it is larger than the sum of its proper divisors (399558).

159645796249 is an frugal number, since it uses more digits than its factorization.

159645796249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799114 (or 399557 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 67.

The spelling of 159645796249 in words is "one hundred fifty-nine billion, six hundred forty-five million, seven hundred ninety-six thousand, two hundred forty-nine".