159691855 has 4 divisors (see below), whose sum is σ = 191630232. Its totient is φ = 127753480.

The previous prime is 159691849. The next prime is 159691859. The reversal of 159691855 is 558196951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558196951 = 13 ⋅42938227.

It is not a de Polignac number, because 159691855 - 2⁵ = 159691823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159691799 and 159691808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159691859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15969181 + ... + 15969190.

It is an arithmetic number, because the mean of its divisors is an integer number (47907558).

Almost surely, 2^159691855 is an apocalyptic number.

159691855 is a deficient number, since it is larger than the sum of its proper divisors (31938377).

159691855 is an equidigital number, since it uses as much as digits as its factorization.

159691855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31938376.

The product of its digits is 486000, while the sum is 49.

The square root of 159691855 is about 12636.9242697739. The cubic root of 159691855 is about 542.5347850872.

The spelling of 159691855 in words is "one hundred fifty-nine million, six hundred ninety-one thousand, eight hundred fifty-five".