25551033551 has 2 divisors, whose sum is σ = 25551033552. Its totient is φ = 25551033550.

The previous prime is 25551033539. The next prime is 25551033577. The reversal of 25551033551 is 15533015552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25551033551 - 2¹⁰ = 25551032527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25451033551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775516775 + 12775516776.

It is an arithmetic number, because the mean of its divisors is an integer number (12775516776).

Almost surely, 2^25551033551 is an apocalyptic number.

25551033551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551033551 is an equidigital number, since it uses as much as digits as its factorization.

25551033551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 25551033551 in words is "twenty-five billion, five hundred fifty-one million, thirty-three thousand, five hundred fifty-one".