164420661147503 has 4 divisors (see below), whose sum is σ = 164421279413208. Its totient is φ = 164420042881800.

The previous prime is 164420661147493. The next prime is 164420661147517. The reversal of 164420661147503 is 305741166024461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164420661147503 - 2¹⁸ = 164420660885359 is a prime.

It is a super-3 number, since 3×164420661147503³ (a number of 44 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 (164420661147403) 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, 308733773 + ... + 309265878.

It is an arithmetic number, because the mean of its divisors is an integer number (41105319853302).

Almost surely, 2^{164420661147503} is an apocalyptic number.

164420661147503 is a deficient number, since it is larger than the sum of its proper divisors (618265705).

164420661147503 is an equidigital number, since it uses as much as digits as its factorization.

164420661147503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618265704.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 164420661147503 in words is "one hundred sixty-four trillion, four hundred twenty billion, six hundred sixty-one million, one hundred forty-seven thousand, five hundred three".