164459865 has 8 divisors (see below), whose sum is σ = 263135808. Its totient is φ = 87711920.

The previous prime is 164459863. The next prime is 164459881. The reversal of 164459865 is 568954461.

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

It is not a de Polignac number, because 164459865 - 2¹ = 164459863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164459863) 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, 5481981 + ... + 5482010.

It is an arithmetic number, because the mean of its divisors is an integer number (32891976).

Almost surely, 2^164459865 is an apocalyptic number.

164459865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164459865 is a deficient number, since it is larger than the sum of its proper divisors (98675943).

164459865 is a wasteful number, since it uses less digits than its factorization.

164459865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10963999.

The product of its digits is 1036800, while the sum is 48.

The square root of 164459865 is about 12824.1906177349. The cubic root of 164459865 is about 547.8815088706.

The spelling of 164459865 in words is "one hundred sixty-four million, four hundred fifty-nine thousand, eight hundred sixty-five".