164651906 has 8 divisors (see below), whose sum is σ = 247451664. Its totient is φ = 82168020.

The previous prime is 164651873. The next prime is 164651909. The reversal of 164651906 is 609156461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×164651906² = 54220500298865672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164651906.

It is not an unprimeable number, because it can be changed into a prime (164651909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77660 + ... + 79751.

It is an arithmetic number, because the mean of its divisors is an integer number (30931458).

Almost surely, 2^164651906 is an apocalyptic number.

164651906 is a deficient number, since it is larger than the sum of its proper divisors (82799758).

164651906 is a wasteful number, since it uses less digits than its factorization.

164651906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157936.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 164651906 is about 12831.6758843107. The cubic root of 164651906 is about 548.0946810138.

The spelling of 164651906 in words is "one hundred sixty-four million, six hundred fifty-one thousand, nine hundred six".