25555525747 has 2 divisors, whose sum is σ = 25555525748. Its totient is φ = 25555525746.

The previous prime is 25555525741. The next prime is 25555525781. The reversal of 25555525747 is 74752555552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555525747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25555525694 and 25555525703.

It is not a weakly prime, because it can be changed into another prime (25555525741) 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 as a sum of consecutive naturals, namely, 12777762873 + 12777762874.

It is an arithmetic number, because the mean of its divisors is an integer number (12777762874).

Almost surely, 2^25555525747 is an apocalyptic number.

25555525747 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555525747 is an equidigital number, since it uses as much as digits as its factorization.

25555525747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12250000, while the sum is 52.

The spelling of 25555525747 in words is "twenty-five billion, five hundred fifty-five million, five hundred twenty-five thousand, seven hundred forty-seven".