4149806081 has 4 divisors (see below), whose sum is σ = 4150578132. Its totient is φ = 4149034032.

The previous prime is 4149806047. The next prime is 4149806099. The reversal of 4149806081 is 1806089414.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2096266225 + 2053539856 = 45785^2 + 45316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4149806081 is a prime.

It is a super-2 number, since 2×4149806081² = 34441781019809157122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4149805081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377906 + ... + 388731.

It is an arithmetic number, because the mean of its divisors is an integer number (1037644533).

Almost surely, 2^4149806081 is an apocalyptic number.

It is an amenable number.

4149806081 is a deficient number, since it is larger than the sum of its proper divisors (772051).

4149806081 is an equidigital number, since it uses as much as digits as its factorization.

4149806081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772050.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 4149806081 is about 64418.9885127049. The cubic root of 4149806081 is about 1606.9755445466.

The spelling of 4149806081 in words is "four billion, one hundred forty-nine million, eight hundred six thousand, eighty-one".