164401672 has 8 divisors (see below), whose sum is σ = 308253150. Its totient is φ = 82200832.

The previous prime is 164401613. The next prime is 164401681. The reversal of 164401672 is 276104461.

It can be written as a sum of positive squares in only one way, i.e., 113507716 + 50893956 = 10654^2 + 7134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×164401672³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275097 + ... + 10275112.

Almost surely, 2^164401672 is an apocalyptic number.

It is an amenable number.

164401672 is a deficient number, since it is larger than the sum of its proper divisors (143851478).

164401672 is a wasteful number, since it uses less digits than its factorization.

164401672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20550215 (or 20550211 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 164401672 is about 12821.9215408612. The cubic root of 164401672 is about 547.8168798705.

The spelling of 164401672 in words is "one hundred sixty-four million, four hundred one thousand, six hundred seventy-two".