25530967789 has 2 divisors, whose sum is σ = 25530967790. Its totient is φ = 25530967788.

The previous prime is 25530967783. The next prime is 25530967841. The reversal of 25530967789 is 98776903552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19869157764 + 5661810025 = 140958^2 + 75245^2 .

It is a cyclic number.

It is not a de Polignac number, because 25530967789 - 2⁹ = 25530967277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25530967783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765483894 + 12765483895.

It is an arithmetic number, because the mean of its divisors is an integer number (12765483895).

Almost surely, 2^25530967789 is an apocalyptic number.

It is an amenable number.

25530967789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530967789 is an equidigital number, since it uses as much as digits as its factorization.

25530967789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28576800, while the sum is 61.

The spelling of 25530967789 in words is "twenty-five billion, five hundred thirty million, nine hundred sixty-seven thousand, seven hundred eighty-nine".