25543540541 has 2 divisors, whose sum is σ = 25543540542. Its totient is φ = 25543540540.

The previous prime is 25543540523. The next prime is 25543540571. The reversal of 25543540541 is 14504534552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14221516516 + 11322024025 = 119254^2 + 106405^2 .

It is a cyclic number.

It is not a de Polignac number, because 25543540541 - 2²⁶ = 25476431677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25543540495 and 25543540504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25543540501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771770270 + 12771770271.

It is an arithmetic number, because the mean of its divisors is an integer number (12771770271).

Almost surely, 2^25543540541 is an apocalyptic number.

It is an amenable number.

25543540541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25543540541 is an equidigital number, since it uses as much as digits as its factorization.

25543540541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 25543540541 in words is "twenty-five billion, five hundred forty-three million, five hundred forty thousand, five hundred forty-one".