164999808 has 64 divisors (see below), whose sum is σ = 486988800. Its totient is φ = 54998784.

The previous prime is 164999803. The next prime is 164999831. The reversal of 164999808 is 808999461.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (164999801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20416 + ... + 27327.

It is an arithmetic number, because the mean of its divisors is an integer number (7609200).

Almost surely, 2^164999808 is an apocalyptic number.

164999808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164999808 is an abundant number, since it is smaller than the sum of its proper divisors (321988992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164999808 is an equidigital number, since it uses as much as digits as its factorization.

164999808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47766 (or 47748 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 164999808 is about 12845.2251050731. The cubic root of 164999808 is about 548.4804424992.

The spelling of 164999808 in words is "one hundred sixty-four million, nine hundred ninety-nine thousand, eight hundred eight".