159640390191 has 4 divisors (see below), whose sum is σ = 212853853592. Its totient is φ = 106426926792.

The previous prime is 159640390183. The next prime is 159640390193. The reversal of 159640390191 is 191093046951.

159640390191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 159640390191 - 2³ = 159640390183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159640390191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159640390193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26606731696 + ... + 26606731701.

It is an arithmetic number, because the mean of its divisors is an integer number (53213463398).

Almost surely, 2^159640390191 is an apocalyptic number.

159640390191 is a deficient number, since it is larger than the sum of its proper divisors (53213463401).

159640390191 is an equidigital number, since it uses as much as digits as its factorization.

159640390191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53213463400.

The product of its (nonzero) digits is 262440, while the sum is 48.

The spelling of 159640390191 in words is "one hundred fifty-nine billion, six hundred forty million, three hundred ninety thousand, one hundred ninety-one".