164187478433 has 4 divisors (see below), whose sum is σ = 179113612848. Its totient is φ = 149261344020.

The previous prime is 164187478421. The next prime is 164187478447. The reversal of 164187478433 is 334874781461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164187478433 - 2¹² = 164187474337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164187478033) 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 3 ways as a sum of consecutive naturals, for example, 7463067191 + ... + 7463067212.

It is an arithmetic number, because the mean of its divisors is an integer number (44778403212).

Almost surely, 2^164187478433 is an apocalyptic number.

It is an amenable number.

164187478433 is a deficient number, since it is larger than the sum of its proper divisors (14926134415).

164187478433 is a wasteful number, since it uses less digits than its factorization.

164187478433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14926134414.

The product of its digits is 10838016, while the sum is 56.

The spelling of 164187478433 in words is "one hundred sixty-four billion, one hundred eighty-seven million, four hundred seventy-eight thousand, four hundred thirty-three".