164774805 has 16 divisors (see below), whose sum is σ = 283920000. Its totient is φ = 81119808.

The previous prime is 164774791. The next prime is 164774807. The reversal of 164774805 is 508477461.

It is not a de Polignac number, because 164774805 - 2⁴ = 164774789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164774807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422305 + ... + 422694.

It is an arithmetic number, because the mean of its divisors is an integer number (17745000).

Almost surely, 2^164774805 is an apocalyptic number.

164774805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164774805 is a deficient number, since it is larger than the sum of its proper divisors (119145195).

164774805 is a wasteful number, since it uses less digits than its factorization.

164774805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845020.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 164774805 is about 12836.4638822380. The cubic root of 164774805 is about 548.2310161813.

The spelling of 164774805 in words is "one hundred sixty-four million, seven hundred seventy-four thousand, eight hundred five".