164365838421 has 8 divisors (see below), whose sum is σ = 219717831840. Its totient is φ = 109295535312.

The previous prime is 164365838369. The next prime is 164365838459. The reversal of 164365838421 is 124838563461.

164365838421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-164365838421 is a prime.

It is a super-2 number, since 2×164365838421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164365838321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70421215 + ... + 70423548.

It is an arithmetic number, because the mean of its divisors is an integer number (27464728980).

Almost surely, 2^164365838421 is an apocalyptic number.

It is an amenable number.

164365838421 is a deficient number, since it is larger than the sum of its proper divisors (55351993419).

164365838421 is a wasteful number, since it uses less digits than its factorization.

164365838421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140845155.

The product of its digits is 3317760, while the sum is 51.

The spelling of 164365838421 in words is "one hundred sixty-four billion, three hundred sixty-five million, eight hundred thirty-eight thousand, four hundred twenty-one".