164186137939 has 6 divisors (see below), whose sum is σ = 172829372820. Its totient is φ = 155543088996.

The previous prime is 164186137883. The next prime is 164186137949. The reversal of 164186137939 is 939731681461.

It is not a de Polignac number, because 164186137939 - 2¹¹ = 164186135891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164186137949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1719742 + ... + 1812700.

It is an arithmetic number, because the mean of its divisors is an integer number (28804895470).

Almost surely, 2^164186137939 is an apocalyptic number.

164186137939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

164186137939 is a deficient number, since it is larger than the sum of its proper divisors (8643234881).

164186137939 is an frugal number, since it uses more digits than its factorization.

164186137939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185937 (or 92978 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 58.

The spelling of 164186137939 in words is "one hundred sixty-four billion, one hundred eighty-six million, one hundred thirty-seven thousand, nine hundred thirty-nine".