2543561041641 has 4 divisors (see below), whose sum is σ = 3391414722192. Its totient is φ = 1695707361092.

The previous prime is 2543561041627. The next prime is 2543561041657. The reversal of 2543561041641 is 1461401653452.

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 not a de Polignac number, because 2543561041641 - 2⁹ = 2543561041129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2543561041593 and 2543561041602.

It is not an unprimeable number, because it can be changed into a prime (2543561041141) 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, 423926840271 + ... + 423926840276.

It is an arithmetic number, because the mean of its divisors is an integer number (847853680548).

Almost surely, 2^{2543561041641} is an apocalyptic number.

It is an amenable number.

2543561041641 is a deficient number, since it is larger than the sum of its proper divisors (847853680551).

2543561041641 is an equidigital number, since it uses as much as digits as its factorization.

2543561041641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847853680550.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 2543561041641 in words is "two trillion, five hundred forty-three billion, five hundred sixty-one million, forty-one thousand, six hundred forty-one".