25068648529 has 4 divisors (see below), whose sum is σ = 25135857076. Its totient is φ = 25001439984.

The previous prime is 25068648503. The next prime is 25068648587. The reversal of 25068648529 is 92584686052.

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 8511907600 + 16556740929 = 92260^2 + 128673^2 .

It is a cyclic number.

It is not a de Polignac number, because 25068648529 - 2⁷ = 25068648401 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 25068648529.

It is not an unprimeable number, because it can be changed into a prime (25068648599) 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 in 3 ways as a sum of consecutive naturals, for example, 33603714 + ... + 33604459.

It is an arithmetic number, because the mean of its divisors is an integer number (6283964269).

Almost surely, 2^25068648529 is an apocalyptic number.

It is an amenable number.

25068648529 is a deficient number, since it is larger than the sum of its proper divisors (67208547).

25068648529 is an equidigital number, since it uses as much as digits as its factorization.

25068648529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67208546.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 25068648529 in words is "twenty-five billion, sixty-eight million, six hundred forty-eight thousand, five hundred twenty-nine".