159121409673 has 4 divisors (see below), whose sum is σ = 212161879568. Its totient is φ = 106080939780.

The previous prime is 159121409659. The next prime is 159121409687. The reversal of 159121409673 is 376904121951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (159121409659) and next prime (159121409687).

It is not a de Polignac number, because 159121409673 - 2⁵ = 159121409641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (159121405673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26520234943 + ... + 26520234948.

It is an arithmetic number, because the mean of its divisors is an integer number (53040469892).

Almost surely, 2^159121409673 is an apocalyptic number.

It is an amenable number.

159121409673 is a deficient number, since it is larger than the sum of its proper divisors (53040469895).

159121409673 is an equidigital number, since it uses as much as digits as its factorization.

159121409673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53040469894.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 159121409673 in words is "one hundred fifty-nine billion, one hundred twenty-one million, four hundred nine thousand, six hundred seventy-three".