158220421185 has 32 divisors (see below), whose sum is σ = 254220265728. Its totient is φ = 84028907520.

The previous prime is 158220421147. The next prime is 158220421199. The reversal of 158220421185 is 581124022851.

It is not a de Polignac number, because 158220421185 - 2⁸ = 158220420929 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4802529 + ... + 4835361.

It is an arithmetic number, because the mean of its divisors is an integer number (7944383304).

Almost surely, 2^158220421185 is an apocalyptic number.

158220421185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158220421185 is a deficient number, since it is larger than the sum of its proper divisors (95999844543).

158220421185 is a wasteful number, since it uses less digits than its factorization.

158220421185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34185.

The product of its (nonzero) digits is 51200, while the sum is 39.

The spelling of 158220421185 in words is "one hundred fifty-eight billion, two hundred twenty million, four hundred twenty-one thousand, one hundred eighty-five".