159665152523 has 4 divisors (see below), whose sum is σ = 159756235368. Its totient is φ = 159574069680.

The previous prime is 159665152511. The next prime is 159665152531. The reversal of 159665152523 is 325251566951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325251566951 = 6163 ⋅52774877.

It is a cyclic number.

It is not a de Polignac number, because 159665152523 - 2¹² = 159665148427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159665152573) 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, 45538793 + ... + 45542298.

It is an arithmetic number, because the mean of its divisors is an integer number (39939058842).

Almost surely, 2^159665152523 is an apocalyptic number.

159665152523 is a deficient number, since it is larger than the sum of its proper divisors (91082845).

159665152523 is an equidigital number, since it uses as much as digits as its factorization.

159665152523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91082844.

The product of its digits is 2430000, while the sum is 50.

The spelling of 159665152523 in words is "one hundred fifty-nine billion, six hundred sixty-five million, one hundred fifty-two thousand, five hundred twenty-three".