164509732 has 6 divisors (see below), whose sum is σ = 287892038. Its totient is φ = 82254864.

The previous prime is 164509711. The next prime is 164509739. The reversal of 164509732 is 237905461.

It can be written as a sum of positive squares in only one way, i.e., 164454976 + 54756 = 12824^2 + 234^2 .

It is a junction number, because it is equal to n+sod(n) for n = 164509691 and 164509700.

It is not an unprimeable number, because it can be changed into a prime (164509739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20563713 + ... + 20563720.

Almost surely, 2^164509732 is an apocalyptic number.

It is an amenable number.

164509732 is a deficient number, since it is larger than the sum of its proper divisors (123382306).

164509732 is a wasteful number, since it uses less digits than its factorization.

164509732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41127437 (or 41127435 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 164509732 is about 12826.1347256295. The cubic root of 164509732 is about 547.9368789073.

The spelling of 164509732 in words is "one hundred sixty-four million, five hundred nine thousand, seven hundred thirty-two".