164771995 has 4 divisors (see below), whose sum is σ = 197726400. Its totient is φ = 131817592.

The previous prime is 164771993. The next prime is 164772011. The reversal of 164771995 is 599177461.

164771995 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: 599177461 = 17 ⋅35245733.

It is a cyclic number.

It is not a de Polignac number, because 164771995 - 2¹ = 164771993 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (164771993) 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, 16477195 + ... + 16477204.

It is an arithmetic number, because the mean of its divisors is an integer number (49431600).

Almost surely, 2^164771995 is an apocalyptic number.

164771995 is a deficient number, since it is larger than the sum of its proper divisors (32954405).

164771995 is an equidigital number, since it uses as much as digits as its factorization.

164771995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32954404.

The product of its digits is 476280, while the sum is 49.

The square root of 164771995 is about 12836.3544279519. The cubic root of 164771995 is about 548.2278997301.

The spelling of 164771995 in words is "one hundred sixty-four million, seven hundred seventy-one thousand, nine hundred ninety-five".