159533597997 has 6 divisors (see below), whose sum is σ = 230437419342. Its totient is φ = 106355731992.

The previous prime is 159533597989. The next prime is 159533597999. The reversal of 159533597997 is 799795335951.

159533597997 is a `hidden beast` number, since 15 + 9 + 533 + 5 + 9 + 79 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 138882183561 + 20651414436 = 372669^2 + 143706^2 .

It is not a de Polignac number, because 159533597997 - 2³ = 159533597989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159533597999) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 8862977658 + ... + 8862977675.

It is an arithmetic number, because the mean of its divisors is an integer number (38406236557).

Almost surely, 2^159533597997 is an apocalyptic number.

It is an amenable number.

159533597997 is a deficient number, since it is larger than the sum of its proper divisors (70903821345).

159533597997 is a wasteful number, since it uses less digits than its factorization.

159533597997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17725955339 (or 17725955336 counting only the distinct ones).

The product of its digits is 361675125, while the sum is 72.

The spelling of 159533597997 in words is "one hundred fifty-nine billion, five hundred thirty-three million, five hundred ninety-seven thousand, nine hundred ninety-seven".