3664638173 has 4 divisors (see below), whose sum is σ = 4188157920. Its totient is φ = 3141118428.

The previous prime is 3664638169. The next prime is 3664638191. The reversal of 3664638173 is 3718364663.

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 not a de Polignac number, because 3664638173 - 2² = 3664638169 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 (3664638973) 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, 261759863 + ... + 261759876.

It is an arithmetic number, because the mean of its divisors is an integer number (1047039480).

Almost surely, 2^3664638173 is an apocalyptic number.

It is an amenable number.

3664638173 is a deficient number, since it is larger than the sum of its proper divisors (523519747).

3664638173 is an equidigital number, since it uses as much as digits as its factorization.

3664638173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523519746.

The product of its digits is 1306368, while the sum is 47.

The square root of 3664638173 is about 60536.2550295276. The cubic root of 3664638173 is about 1541.7372553463.

The spelling of 3664638173 in words is "three billion, six hundred sixty-four million, six hundred thirty-eight thousand, one hundred seventy-three".