164433606503 has 4 divisors (see below), whose sum is σ = 166515044640. Its totient is φ = 162352168368.

The previous prime is 164433606401. The next prime is 164433606509. The reversal of 164433606503 is 305606334461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305606334461 = 19 ⋅16084543919.

It is a cyclic number.

It is not a de Polignac number, because 164433606503 - 2⁸ = 164433606247 is a prime.

It is a super-3 number, since 3×164433606503³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164433606509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040718950 + ... + 1040719107.

It is an arithmetic number, because the mean of its divisors is an integer number (41628761160).

Almost surely, 2^164433606503 is an apocalyptic number.

164433606503 is a deficient number, since it is larger than the sum of its proper divisors (2081438137).

164433606503 is an equidigital number, since it uses as much as digits as its factorization.

164433606503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081438136.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 164433606503 in words is "one hundred sixty-four billion, four hundred thirty-three million, six hundred six thousand, five hundred three".