25388510009 has 2 divisors, whose sum is σ = 25388510010. Its totient is φ = 25388510008.

The previous prime is 25388509963. The next prime is 25388510041. The reversal of 25388510009 is 90001588352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21128076025 + 4260433984 = 145355^2 + 65272^2 .

It is a cyclic number.

It is not a de Polignac number, because 25388510009 - 2¹² = 25388505913 is a prime.

It is not a weakly prime, because it can be changed into another prime (25388518009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12694255004 + 12694255005.

It is an arithmetic number, because the mean of its divisors is an integer number (12694255005).

Almost surely, 2^25388510009 is an apocalyptic number.

It is an amenable number.

25388510009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25388510009 is an equidigital number, since it uses as much as digits as its factorization.

25388510009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 25388510009 in words is "twenty-five billion, three hundred eighty-eight million, five hundred ten thousand, nine".