25084537109 has 4 divisors (see below), whose sum is σ = 25557830316. Its totient is φ = 24611243904.

The previous prime is 25084537097. The next prime is 25084537123. The reversal of 25084537109 is 90173548052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19989718225 + 5094818884 = 141385^2 + 71378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25084537109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25084537109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25084537129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236646524 + ... + 236646629.

It is an arithmetic number, because the mean of its divisors is an integer number (6389457579).

Almost surely, 2^25084537109 is an apocalyptic number.

It is an amenable number.

25084537109 is a deficient number, since it is larger than the sum of its proper divisors (473293207).

25084537109 is an equidigital number, since it uses as much as digits as its factorization.

25084537109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473293206.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 25084537109 in words is "twenty-five billion, eighty-four million, five hundred thirty-seven thousand, one hundred nine".