158521808215 has 16 divisors (see below), whose sum is σ = 195381426240. Its totient is φ = 123381100800.

The previous prime is 158521808183. The next prime is 158521808219. The reversal of 158521808215 is 512808125851.

158521808215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158521808215 - 2⁵ = 158521808183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158521808219) 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 15 ways as a sum of consecutive naturals, for example, 3939166 + ... + 3979204.

It is an arithmetic number, because the mean of its divisors is an integer number (12211339140).

Almost surely, 2^158521808215 is an apocalyptic number.

158521808215 is a deficient number, since it is larger than the sum of its proper divisors (36859618025).

158521808215 is a wasteful number, since it uses less digits than its factorization.

158521808215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61482.

The product of its (nonzero) digits is 256000, while the sum is 46.

The spelling of 158521808215 in words is "one hundred fifty-eight billion, five hundred twenty-one million, eight hundred eight thousand, two hundred fifteen".