164731553 has 4 divisors (see below), whose sum is σ = 188264640. Its totient is φ = 141198468.

The previous prime is 164731531. The next prime is 164731559. The reversal of 164731553 is 355137461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164731553 - 2⁸ = 164731297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164731559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11766533 + ... + 11766546.

It is an arithmetic number, because the mean of its divisors is an integer number (47066160).

Almost surely, 2^164731553 is an apocalyptic number.

It is an amenable number.

164731553 is a deficient number, since it is larger than the sum of its proper divisors (23533087).

164731553 is an equidigital number, since it uses as much as digits as its factorization.

164731553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23533086.

The product of its digits is 37800, while the sum is 35.

The square root of 164731553 is about 12834.7790397809. The cubic root of 164731553 is about 548.1830433071.

The spelling of 164731553 in words is "one hundred sixty-four million, seven hundred thirty-one thousand, five hundred fifty-three".