4081528409 has 4 divisors (see below), whose sum is σ = 4664603904. Its totient is φ = 3498452916.

The previous prime is 4081528391. The next prime is 4081528421. The reversal of 4081528409 is 9048251804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4081528409 - 2⁸ = 4081528153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4081528439) 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, 291537737 + ... + 291537750.

It is an arithmetic number, because the mean of its divisors is an integer number (1166150976).

Almost surely, 2^4081528409 is an apocalyptic number.

It is an amenable number.

4081528409 is a deficient number, since it is larger than the sum of its proper divisors (583075495).

4081528409 is an equidigital number, since it uses as much as digits as its factorization.

4081528409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583075494.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 4081528409 is about 63886.8406559598. The cubic root of 4081528409 is about 1598.1134547213.

The spelling of 4081528409 in words is "four billion, eighty-one million, five hundred twenty-eight thousand, four hundred nine".