159541371693 has 36 divisors (see below), whose sum is σ = 254168083260. Its totient is φ = 96361541760.

The previous prime is 159541371667. The next prime is 159541371697. The reversal of 159541371693 is 396173145951.

159541371693 is a `hidden beast` number, since 1 + 5 + 9 + 541 + 3 + 7 + 1 + 6 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 109467016164 + 50074355529 = 330858^2 + 223773^2 .

It is a de Polignac number, because none of the positive numbers 2^k-159541371693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159541371697) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69073 + ... + 569081.

It is an arithmetic number, because the mean of its divisors is an integer number (7060224535).

Almost surely, 2^159541371693 is an apocalyptic number.

It is an amenable number.

159541371693 is a deficient number, since it is larger than the sum of its proper divisors (94626711567).

159541371693 is a wasteful number, since it uses less digits than its factorization.

159541371693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500330 (or 500316 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The spelling of 159541371693 in words is "one hundred fifty-nine billion, five hundred forty-one million, three hundred seventy-one thousand, six hundred ninety-three".