25254566551 has 2 divisors, whose sum is σ = 25254566552. Its totient is φ = 25254566550.

The previous prime is 25254566537. The next prime is 25254566627. The reversal of 25254566551 is 15566545252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25254566551 - 2¹³ = 25254558359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25254566521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627283275 + 12627283276.

It is an arithmetic number, because the mean of its divisors is an integer number (12627283276).

Almost surely, 2^25254566551 is an apocalyptic number.

25254566551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25254566551 is an equidigital number, since it uses as much as digits as its factorization.

25254566551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800000, while the sum is 46.

The spelling of 25254566551 in words is "twenty-five billion, two hundred fifty-four million, five hundred sixty-six thousand, five hundred fifty-one".