4540040809 has 4 divisors (see below), whose sum is σ = 4597509760. Its totient is φ = 4482571860.

The previous prime is 4540040807. The next prime is 4540040851. The reversal of 4540040809 is 9080400454.

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 a cyclic number.

It is not a de Polignac number, because 4540040809 - 2¹ = 4540040807 is a prime.

It is a super-2 number, since 2×4540040809² = 41223941094770748962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4540040807) 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, 28734357 + ... + 28734514.

It is an arithmetic number, because the mean of its divisors is an integer number (1149377440).

Almost surely, 2^4540040809 is an apocalyptic number.

It is an amenable number.

4540040809 is a deficient number, since it is larger than the sum of its proper divisors (57468951).

4540040809 is an equidigital number, since it uses as much as digits as its factorization.

4540040809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57468950.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 4540040809 is about 67379.8249404078. The cubic root of 4540040809 is about 1655.8459069251.

The spelling of 4540040809 in words is "four billion, five hundred forty million, forty thousand, eight hundred nine".