159223771897 has 8 divisors (see below), whose sum is σ = 165308891400. Its totient is φ = 153178295424.

The previous prime is 159223771879. The next prime is 159223771913. The reversal of 159223771897 is 798177322951.

It can be written as a sum of positive squares in 4 ways, for example, as 552203001 + 158671568896 = 23499^2 + 398336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159223771897 - 2¹⁹ = 159223247609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159223771877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9902572 + ... + 9918637.

It is an arithmetic number, because the mean of its divisors is an integer number (20663611425).

Almost surely, 2^159223771897 is an apocalyptic number.

It is an amenable number.

159223771897 is a deficient number, since it is larger than the sum of its proper divisors (6085119503).

159223771897 is a wasteful number, since it uses less digits than its factorization.

159223771897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19821515.

The product of its digits is 13335840, while the sum is 61.

The spelling of 159223771897 in words is "one hundred fifty-nine billion, two hundred twenty-three million, seven hundred seventy-one thousand, eight hundred ninety-seven".