2809954081 has 27 divisors (see below), whose sum is σ = 3180341619. Its totient is φ = 2480821200.

The previous prime is 2809954051. The next prime is 2809954087. The reversal of 2809954081 is 1804599082.

The square root of 2809954081 is 53009.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 91374481 + 2718579600 = 9559^2 + 52140^2 .

It is not a de Polignac number, because 2809954081 - 2²⁷ = 2675736353 is a prime.

It is a super-2 number, since 2×2809954081² = 15791683874657109122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2809954087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 35569000 + ... + 35569078.

Almost surely, 2^2809954081 is an apocalyptic number.

2809954081 is the 53009-th square number.

2809954081 is the 26505-th centered octagonal number.

It is an amenable number.

2809954081 is a deficient number, since it is larger than the sum of its proper divisors (370387538).

2809954081 is an frugal number, since it uses more digits than its factorization.

2809954081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The cubic root of 2809954081 is about 1411.1279944726.

The spelling of 2809954081 in words is "two billion, eight hundred nine million, nine hundred fifty-four thousand, eighty-one".