164781411 has 4 divisors (see below), whose sum is σ = 219708552. Its totient is φ = 109854272.

The previous prime is 164781403. The next prime is 164781437. The reversal of 164781411 is 114187461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114187461 = 3 ⋅38062487.

It is a cyclic number.

It is not a de Polignac number, because 164781411 - 2³ = 164781403 is a prime.

It is a super-2 number, since 2×164781411² = 54305826822301842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164781511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27463566 + ... + 27463571.

It is an arithmetic number, because the mean of its divisors is an integer number (54927138).

Almost surely, 2^164781411 is an apocalyptic number.

164781411 is a deficient number, since it is larger than the sum of its proper divisors (54927141).

164781411 is an equidigital number, since it uses as much as digits as its factorization.

164781411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54927140.

The product of its digits is 5376, while the sum is 33.

The square root of 164781411 is about 12836.7211935136. The cubic root of 164781411 is about 548.2383424747.

The spelling of 164781411 in words is "one hundred sixty-four million, seven hundred eighty-one thousand, four hundred eleven".