2541648181 has 4 divisors (see below), whose sum is σ = 2623636864. Its totient is φ = 2459659500.

The previous prime is 2541648169. The next prime is 2541648191. The reversal of 2541648181 is 1818461452.

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 a de Polignac number, because none of the positive numbers 2^k-2541648181 is a prime.

It is a super-2 number, since 2×2541648181² = 12919950951961217522, 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 (2541648101) 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, 40994295 + ... + 40994356.

It is an arithmetic number, because the mean of its divisors is an integer number (655909216).

Almost surely, 2^2541648181 is an apocalyptic number.

It is an amenable number.

2541648181 is a deficient number, since it is larger than the sum of its proper divisors (81988683).

2541648181 is an equidigital number, since it uses as much as digits as its factorization.

2541648181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81988682.

The product of its digits is 61440, while the sum is 40.

The square root of 2541648181 is about 50414.7615386605. The cubic root of 2541648181 is about 1364.7040431408.

The spelling of 2541648181 in words is "two billion, five hundred forty-one million, six hundred forty-eight thousand, one hundred eighty-one".