25322851009 has 2 divisors, whose sum is σ = 25322851010. Its totient is φ = 25322851008.

The previous prime is 25322850979. The next prime is 25322851063. The reversal of 25322851009 is 90015822352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23522970384 + 1799880625 = 153372^2 + 42425^2 .

It is a cyclic number.

It is not a de Polignac number, because 25322851009 - 2¹¹ = 25322848961 is a prime.

It is not a weakly prime, because it can be changed into another prime (25322855009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12661425504 + 12661425505.

It is an arithmetic number, because the mean of its divisors is an integer number (12661425505).

Almost surely, 2^25322851009 is an apocalyptic number.

It is an amenable number.

25322851009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25322851009 is an equidigital number, since it uses as much as digits as its factorization.

25322851009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 25322851009 in words is "twenty-five billion, three hundred twenty-two million, eight hundred fifty-one thousand, nine".