25283572409 has 2 divisors, whose sum is σ = 25283572410. Its totient is φ = 25283572408.

The previous prime is 25283572399. The next prime is 25283572421. The reversal of 25283572409 is 90427538252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25026290809 + 257281600 = 158197^2 + 16040^2 .

It is a cyclic number.

It is not a de Polignac number, because 25283572409 - 2⁴ = 25283572393 is a prime.

It is a super-2 number, since 2×25283572409² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25283572429) 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, 12641786204 + 12641786205.

It is an arithmetic number, because the mean of its divisors is an integer number (12641786205).

Almost surely, 2^25283572409 is an apocalyptic number.

It is an amenable number.

25283572409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25283572409 is an equidigital number, since it uses as much as digits as its factorization.

25283572409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 25283572409 in words is "twenty-five billion, two hundred eighty-three million, five hundred seventy-two thousand, four hundred nine".