159837011893 has 4 divisors (see below), whose sum is σ = 172132166668. Its totient is φ = 147541857120.

The previous prime is 159837011861. The next prime is 159837011911. The reversal of 159837011893 is 398110738951.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25337317329 + 134499694564 = 159177^2 + 366742^2 .

It is a cyclic number.

It is not a de Polignac number, because 159837011893 - 2⁵ = 159837011861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159837011093) 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, 6147577368 + ... + 6147577393.

It is an arithmetic number, because the mean of its divisors is an integer number (43033041667).

Almost surely, 2^159837011893 is an apocalyptic number.

159837011893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

159837011893 is a deficient number, since it is larger than the sum of its proper divisors (12295154775).

159837011893 is a wasteful number, since it uses less digits than its factorization.

159837011893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12295154774.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The spelling of 159837011893 in words is "one hundred fifty-nine billion, eight hundred thirty-seven million, eleven thousand, eight hundred ninety-three".