2541561543 has 56 divisors (see below), whose sum is σ = 4031596080. Its totient is φ = 1597034880.

The previous prime is 2541561527. The next prime is 2541561559. The reversal of 2541561543 is 3451651452.

2541561543 is a `hidden beast` number, since 2 + 5 + 41 + 561 + 54 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (2541561527) and next prime (2541561559).

It is not a de Polignac number, because 2541561543 - 2⁴ = 2541561527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2541561498 and 2541561507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541561563) 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 55 ways as a sum of consecutive naturals, for example, 3891805 + ... + 3892457.

Almost surely, 2^2541561543 is an apocalyptic number.

2541561543 is a deficient number, since it is larger than the sum of its proper divisors (1490034537).

2541561543 is an equidigital number, since it uses as much as digits as its factorization.

2541561543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 956 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 2541561543 is about 50413.9022790341. The cubic root of 2541561543 is about 1364.6885365923.

The spelling of 2541561543 in words is "two billion, five hundred forty-one million, five hundred sixty-one thousand, five hundred forty-three".