164728769421 has 8 divisors (see below), whose sum is σ = 232558262784. Its totient is φ = 103359227840.

The previous prime is 164728769393. The next prime is 164728769431. The reversal of 164728769421 is 124967827461.

164728769421 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 cyclic number.

It is not a de Polignac number, because 164728769421 - 2¹⁴ = 164728753037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164728769431) 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, 1614987885 + ... + 1614987986.

It is an arithmetic number, because the mean of its divisors is an integer number (29069782848).

Almost surely, 2^164728769421 is an apocalyptic number.

It is an amenable number.

164728769421 is a deficient number, since it is larger than the sum of its proper divisors (67829493363).

164728769421 is a wasteful number, since it uses less digits than its factorization.

164728769421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229975891.

The product of its digits is 8128512, while the sum is 57.

The spelling of 164728769421 in words is "one hundred sixty-four billion, seven hundred twenty-eight million, seven hundred sixty-nine thousand, four hundred twenty-one".