158660313817 has 8 divisors (see below), whose sum is σ = 159293138760. Its totient is φ = 158027808000.

The previous prime is 158660313803. The next prime is 158660313859. The reversal of 158660313817 is 718313066851.

It can be written as a sum of positive squares in 4 ways, for example, as 116186841 + 158544126976 = 10779^2 + 398176^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 158660313817 - 2¹¹ = 158660311769 is a prime.

It is a super-2 number, since 2×158660313817² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158660310817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942567 + ... + 1098067.

It is an arithmetic number, because the mean of its divisors is an integer number (19911642345).

Almost surely, 2^158660313817 is an apocalyptic number.

It is an amenable number.

158660313817 is a deficient number, since it is larger than the sum of its proper divisors (632824943).

158660313817 is a wasteful number, since it uses less digits than its factorization.

158660313817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159563.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 158660313817 in words is "one hundred fifty-eight billion, six hundred sixty million, three hundred thirteen thousand, eight hundred seventeen".