164381819 has 12 divisors (see below), whose sum is σ = 195669144. Its totient is φ = 137620224.

The previous prime is 164381807. The next prime is 164381821. The reversal of 164381819 is 918183461.

164381819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164381819 - 2⁴ = 164381803 is a prime.

It is a super-2 number, since 2×164381819² = 54042764835497522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164380819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36902 + ... + 41115.

It is an arithmetic number, because the mean of its divisors is an integer number (16305762).

Almost surely, 2^164381819 is an apocalyptic number.

164381819 is a deficient number, since it is larger than the sum of its proper divisors (31287325).

164381819 is an equidigital number, since it uses as much as digits as its factorization.

164381819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78074 (or 78067 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 164381819 is about 12821.1473355546. The cubic root of 164381819 is about 547.7948276894.

The spelling of 164381819 in words is "one hundred sixty-four million, three hundred eighty-one thousand, eight hundred nineteen".