4099995581 has 6 divisors (see below), whose sum is σ = 4506606846. Its totient is φ = 3727268600.

The previous prime is 4099995563. The next prime is 4099995589. The reversal of 4099995581 is 1855999904.

It can be written as a sum of positive squares in only one way, i.e., 4028440900 + 71554681 = 63470^2 + 8459^2 .

It is not a de Polignac number, because 4099995581 - 2⁶ = 4099995517 is a prime.

It is a super-2 number, since 2×4099995581² = 33619927528439055122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4099995581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099995589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16942010 + ... + 16942251.

It is an arithmetic number, because the mean of its divisors is an integer number (751101141).

Almost surely, 2^4099995581 is an apocalyptic number.

It is an amenable number.

4099995581 is a deficient number, since it is larger than the sum of its proper divisors (406611265).

4099995581 is a wasteful number, since it uses less digits than its factorization.

4099995581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33884283 (or 33884272 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 59.

The square root of 4099995581 is about 64031.2078677265. The cubic root of 4099995581 is about 1600.5200888666.

The spelling of 4099995581 in words is "four billion, ninety-nine million, nine hundred ninety-five thousand, five hundred eighty-one".