25557388375543 has 2 divisors, whose sum is σ = 25557388375544. Its totient is φ = 25557388375542.

The previous prime is 25557388375537. The next prime is 25557388375553. The reversal of 25557388375543 is 34557388375552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25557388375543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25557388375553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778694187771 + 12778694187772.

It is an arithmetic number, because the mean of its divisors is an integer number (12778694187772).

Almost surely, 2^{25557388375543} is an apocalyptic number.

25557388375543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25557388375543 is an equidigital number, since it uses as much as digits as its factorization.

25557388375543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800000, while the sum is 70.

Subtracting 25557388375543 from its reverse (34557388375552), we obtain a palindrome (9000000000009).

The spelling of 25557388375543 in words is "twenty-five trillion, five hundred fifty-seven billion, three hundred eighty-eight million, three hundred seventy-five thousand, five hundred forty-three".