164442651 has 4 divisors (see below), whose sum is σ = 219256872. Its totient is φ = 109628432.

The previous prime is 164442643. The next prime is 164442697. The reversal of 164442651 is 156244461.

164442651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156244461 = 3 ⋅52081487.

It is a cyclic number.

It is not a de Polignac number, because 164442651 - 2³ = 164442643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164442851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27407106 + ... + 27407111.

It is an arithmetic number, because the mean of its divisors is an integer number (54814218).

Almost surely, 2^164442651 is an apocalyptic number.

164442651 is a deficient number, since it is larger than the sum of its proper divisors (54814221).

164442651 is an equidigital number, since it uses as much as digits as its factorization.

164442651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54814220.

The product of its digits is 23040, while the sum is 33.

The square root of 164442651 is about 12823.5194467042. The cubic root of 164442651 is about 547.8623926334.

The spelling of 164442651 in words is "one hundred sixty-four million, four hundred forty-two thousand, six hundred fifty-one".