159404079981 has 16 divisors (see below), whose sum is σ = 214624552064. Its totient is φ = 105226712064.

The previous prime is 159404079973. The next prime is 159404079997. The reversal of 159404079981 is 189970404951.

It is not a de Polignac number, because 159404079981 - 2³ = 159404079973 is a prime.

It is a super-2 number, since 2×159404079981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159404079931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3865785 + ... + 3906801.

It is an arithmetic number, because the mean of its divisors is an integer number (13414034504).

Almost surely, 2^159404079981 is an apocalyptic number.

It is an amenable number.

159404079981 is a deficient number, since it is larger than the sum of its proper divisors (55220472083).

159404079981 is a wasteful number, since it uses less digits than its factorization.

159404079981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53700.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 159404079981 in words is "one hundred fifty-nine billion, four hundred four million, seventy-nine thousand, nine hundred eighty-one".