164043631223021 has 16 divisors (see below), whose sum is σ = 178980518419200. Its totient is φ = 149110717272000.

The previous prime is 164043631223009. The next prime is 164043631223039. The reversal of 164043631223021 is 120322136340461.

164043631223021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164043631223021 - 2⁶ = 164043631222957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164043633223021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4029644615 + ... + 4029685323.

It is an arithmetic number, because the mean of its divisors is an integer number (11186282401200).

Almost surely, 2^{164043631223021} is an apocalyptic number.

164043631223021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164043631223021 is a deficient number, since it is larger than the sum of its proper divisors (14936887196179).

164043631223021 is a wasteful number, since it uses less digits than its factorization.

164043631223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80500.

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 164043631223021 its reverse (120322136340461), we get a palindrome (284365767563482).

The spelling of 164043631223021 in words is "one hundred sixty-four trillion, forty-three billion, six hundred thirty-one million, two hundred twenty-three thousand, twenty-one".