4009485181 has 4 divisors (see below), whose sum is σ = 4317907132. Its totient is φ = 3701063232.

The previous prime is 4009485169. The next prime is 4009485197. The reversal of 4009485181 is 1815849004.

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 473280025 + 3536205156 = 21755^2 + 59466^2 .

It is a cyclic number.

It is not a de Polignac number, because 4009485181 - 2⁵ = 4009485149 is a prime.

It is a super-2 number, since 2×4009485181² = 32151942833317205522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009485101) 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, 154210956 + ... + 154210981.

It is an arithmetic number, because the mean of its divisors is an integer number (1079476783).

Almost surely, 2^4009485181 is an apocalyptic number.

It is an amenable number.

4009485181 is a deficient number, since it is larger than the sum of its proper divisors (308421951).

4009485181 is a wasteful number, since it uses less digits than its factorization.

4009485181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308421950.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 4009485181 is about 63320.4957419002. The cubic root of 4009485181 is about 1588.6547936840.

The spelling of 4009485181 in words is "four billion, nine million, four hundred eighty-five thousand, one hundred eighty-one".