158221852617 has 16 divisors (see below), whose sum is σ = 223416982080. Its totient is φ = 99256476672.

The previous prime is 158221852597. The next prime is 158221852717. The reversal of 158221852617 is 716258122851.

It is not a de Polignac number, because 158221852617 - 2⁶ = 158221852553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158221852717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54223 + ... + 565140.

It is an arithmetic number, because the mean of its divisors is an integer number (13963561380).

Almost surely, 2^158221852617 is an apocalyptic number.

158221852617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

158221852617 is a deficient number, since it is larger than the sum of its proper divisors (65195129463).

158221852617 is a wasteful number, since it uses less digits than its factorization.

158221852617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624392.

The product of its digits is 537600, while the sum is 48.

The spelling of 158221852617 in words is "one hundred fifty-eight billion, two hundred twenty-one million, eight hundred fifty-two thousand, six hundred seventeen".