25555298063 has 2 divisors, whose sum is σ = 25555298064. Its totient is φ = 25555298062.

The previous prime is 25555298039. The next prime is 25555298081. The reversal of 25555298063 is 36089255552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555298063 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25555298023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777649031 + 12777649032.

It is an arithmetic number, because the mean of its divisors is an integer number (12777649032).

Almost surely, 2^25555298063 is an apocalyptic number.

25555298063 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555298063 is an equidigital number, since it uses as much as digits as its factorization.

25555298063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 25555298063 in words is "twenty-five billion, five hundred fifty-five million, two hundred ninety-eight thousand, sixty-three".