164021109424987 has 32 divisors (see below), whose sum is σ = 178534521539712. Its totient is φ = 150100893057024.

The previous prime is 164021109424979. The next prime is 164021109425027. The reversal of 164021109424987 is 789424901120461.

It is not a de Polignac number, because 164021109424987 - 2³ = 164021109424979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164021109424937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844645378 + ... + 844839544.

It is an arithmetic number, because the mean of its divisors is an integer number (5579203798116).

Almost surely, 2^{164021109424987} is an apocalyptic number.

164021109424987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

164021109424987 is a deficient number, since it is larger than the sum of its proper divisors (14513412114725).

164021109424987 is a wasteful number, since it uses less digits than its factorization.

164021109424987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202647.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 164021109424987 in words is "one hundred sixty-four trillion, twenty-one billion, one hundred nine million, four hundred twenty-four thousand, nine hundred eighty-seven".