2541785881 has 8 divisors (see below), whose sum is σ = 2672541000. Its totient is φ = 2413904640.

The previous prime is 2541785879. The next prime is 2541785893. The reversal of 2541785881 is 1885871452.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72590400 + 2469195481 = 8520^2 + 49691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2541785881 - 2¹ = 2541785879 is a prime.

It is a super-2 number, since 2×2541785881² = 12921350929701892322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2541780881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716656 + ... + 720193.

It is an arithmetic number, because the mean of its divisors is an integer number (334067625).

Almost surely, 2^2541785881 is an apocalyptic number.

It is an amenable number.

2541785881 is a deficient number, since it is larger than the sum of its proper divisors (130755119).

2541785881 is a wasteful number, since it uses less digits than its factorization.

2541785881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436939.

The product of its digits is 716800, while the sum is 49.

The square root of 2541785881 is about 50416.1271916041. The cubic root of 2541785881 is about 1364.7286880877.

The spelling of 2541785881 in words is "two billion, five hundred forty-one million, seven hundred eighty-five thousand, eight hundred eighty-one".