159942656391 has 8 divisors (see below), whose sum is σ = 243722143104. Its totient is φ = 91395803640.

The previous prime is 159942656371. The next prime is 159942656417. The reversal of 159942656391 is 193656249951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159942656391 - 2²³ = 159934267783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159942656311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3808158465 + ... + 3808158506.

It is an arithmetic number, because the mean of its divisors is an integer number (30465267888).

Almost surely, 2^159942656391 is an apocalyptic number.

159942656391 is a deficient number, since it is larger than the sum of its proper divisors (83779486713).

159942656391 is an equidigital number, since it uses as much as digits as its factorization.

159942656391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616316981.

The product of its digits is 15746400, while the sum is 60.

The spelling of 159942656391 in words is "one hundred fifty-nine billion, nine hundred forty-two million, six hundred fifty-six thousand, three hundred ninety-one".