4099639581 has 16 divisors (see below), whose sum is σ = 6113768320. Its totient is φ = 2714990400.

The previous prime is 4099639567. The next prime is 4099639601. The reversal of 4099639581 is 1859369904.

It is not a de Polignac number, because 4099639581 - 2¹⁵ = 4099606813 is a prime.

It is a super-2 number, since 2×4099639581² = 33614089388203711122, 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 (4099539581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498700 + ... + 506853.

It is an arithmetic number, because the mean of its divisors is an integer number (382110520).

Almost surely, 2^4099639581 is an apocalyptic number.

It is an amenable number.

4099639581 is a deficient number, since it is larger than the sum of its proper divisors (2014128739).

4099639581 is a wasteful number, since it uses less digits than its factorization.

4099639581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005713 (or 1005707 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 4099639581 is about 64028.4279129201. The cubic root of 4099639581 is about 1600.4737634798.

The spelling of 4099639581 in words is "four billion, ninety-nine million, six hundred thirty-nine thousand, five hundred eighty-one".