158278845817 has 4 divisors (see below), whose sum is σ = 159341120100. Its totient is φ = 157216571536.

The previous prime is 158278845749. The next prime is 158278845821. The reversal of 158278845817 is 718548872851.

158278845817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 46355812416 + 111923033401 = 215304^2 + 334549^2 .

It is a cyclic number.

It is not a de Polignac number, because 158278845817 - 2¹¹ = 158278843769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158278845847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531136918 + ... + 531137215.

It is an arithmetic number, because the mean of its divisors is an integer number (39835280025).

Almost surely, 2^158278845817 is an apocalyptic number.

It is an amenable number.

158278845817 is a deficient number, since it is larger than the sum of its proper divisors (1062274283).

158278845817 is a wasteful number, since it uses less digits than its factorization.

158278845817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062274282.

The product of its digits is 40140800, while the sum is 64.

The spelling of 158278845817 in words is "one hundred fifty-eight billion, two hundred seventy-eight million, eight hundred forty-five thousand, eight hundred seventeen".