158054178817 has 4 divisors (see below), whose sum is σ = 158873112580. Its totient is φ = 157235245056.

The previous prime is 158054178803. The next prime is 158054178839. The reversal of 158054178817 is 718871450851.

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 79140379761 + 78913799056 = 281319^2 + 280916^2 .

It is a cyclic number.

It is not a de Polignac number, because 158054178817 - 2¹¹ = 158054176769 is a prime.

It is a super-2 number, since 2×158054178817² (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 (158054178847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409466592 + ... + 409466977.

It is an arithmetic number, because the mean of its divisors is an integer number (39718278145).

Almost surely, 2^158054178817 is an apocalyptic number.

It is an amenable number.

158054178817 is a deficient number, since it is larger than the sum of its proper divisors (818933763).

158054178817 is an equidigital number, since it uses as much as digits as its factorization.

158054178817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818933762.

The product of its (nonzero) digits is 2508800, while the sum is 55.

The spelling of 158054178817 in words is "one hundred fifty-eight billion, fifty-four million, one hundred seventy-eight thousand, eight hundred seventeen".