25125553099 has 2 divisors, whose sum is σ = 25125553100. Its totient is φ = 25125553098.

The previous prime is 25125553097. The next prime is 25125553151. The reversal of 25125553099 is 99035552152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25125553099 - 2¹ = 25125553097 is a prime.

Together with 25125553097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25125553097) 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 as a sum of consecutive naturals, namely, 12562776549 + 12562776550.

It is an arithmetic number, because the mean of its divisors is an integer number (12562776550).

Almost surely, 2^25125553099 is an apocalyptic number.

25125553099 is a deficient number, since it is larger than the sum of its proper divisors (1).

25125553099 is an equidigital number, since it uses as much as digits as its factorization.

25125553099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 607500, while the sum is 46.

The spelling of 25125553099 in words is "twenty-five billion, one hundred twenty-five million, five hundred fifty-three thousand, ninety-nine".