159431299697 has 4 divisors (see below), whose sum is σ = 166363095360. Its totient is φ = 152499504036.

The previous prime is 159431299669. The next prime is 159431299717. The reversal of 159431299697 is 796992134951.

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, and also an emirpimes, since its reverse is a distinct semiprime: 796992134951 = 133519 ⋅5969129.

It is a cyclic number.

It is not a de Polignac number, because 159431299697 - 2⁶ = 159431299633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159431299607) 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, 3465897797 + ... + 3465897842.

It is an arithmetic number, because the mean of its divisors is an integer number (41590773840).

Almost surely, 2^159431299697 is an apocalyptic number.

It is an amenable number.

159431299697 is a deficient number, since it is larger than the sum of its proper divisors (6931795663).

159431299697 is an equidigital number, since it uses as much as digits as its factorization.

159431299697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931795662.

The product of its digits is 33067440, while the sum is 65.

The spelling of 159431299697 in words is "one hundred fifty-nine billion, four hundred thirty-one million, two hundred ninety-nine thousand, six hundred ninety-seven".