164340772 has 6 divisors (see below), whose sum is σ = 287596358. Its totient is φ = 82170384.

The previous prime is 164340769. The next prime is 164340809. The reversal of 164340772 is 277043461.

It can be written as a sum of positive squares in only one way, i.e., 163430656 + 910116 = 12784^2 + 954^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20542593 + ... + 20542600.

Almost surely, 2^164340772 is an apocalyptic number.

It is an amenable number.

164340772 is a deficient number, since it is larger than the sum of its proper divisors (123255586).

164340772 is a wasteful number, since it uses less digits than its factorization.

164340772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41085197 (or 41085195 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 164340772 is about 12819.5464818378. The cubic root of 164340772 is about 547.7492281492.

The spelling of 164340772 in words is "one hundred sixty-four million, three hundred forty thousand, seven hundred seventy-two".