164139811 has 16 divisors (see below), whose sum is σ = 191570400. Its totient is φ = 138977280.

The previous prime is 164139793. The next prime is 164139817. The reversal of 164139811 is 118931461.

It is a cyclic number.

It is not a de Polignac number, because 164139811 - 2⁵ = 164139779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164139817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13615 + ... + 22663.

It is an arithmetic number, because the mean of its divisors is an integer number (11973150).

Almost surely, 2^164139811 is an apocalyptic number.

164139811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164139811 is a deficient number, since it is larger than the sum of its proper divisors (27430589).

164139811 is a wasteful number, since it uses less digits than its factorization.

164139811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174.

The product of its digits is 5184, while the sum is 34.

The square root of 164139811 is about 12811.7060144229. The cubic root of 164139811 is about 547.5258688249.

The spelling of 164139811 in words is "one hundred sixty-four million, one hundred thirty-nine thousand, eight hundred eleven".