164431604 has 6 divisors (see below), whose sum is σ = 287755314. Its totient is φ = 82215800.

The previous prime is 164431591. The next prime is 164431639. The reversal of 164431604 is 406134461.

164431604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 24482704 = 11830^2 + 4948^2 .

It is a super-3 number, since 3×164431604³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20553947 + ... + 20553954.

It is an arithmetic number, because the mean of its divisors is an integer number (47959219).

Almost surely, 2^164431604 is an apocalyptic number.

It is an amenable number.

164431604 is a deficient number, since it is larger than the sum of its proper divisors (123323710).

164431604 is a wasteful number, since it uses less digits than its factorization.

164431604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41107905 (or 41107903 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 164431604 is about 12823.0887074839. The cubic root of 164431604 is about 547.8501241793.

The spelling of 164431604 in words is "one hundred sixty-four million, four hundred thirty-one thousand, six hundred four".