25725648740909 has 8 divisors (see below), whose sum is σ = 27705141156000. Its totient is φ = 23746241519856.

The previous prime is 25725648740833. The next prime is 25725648740917. The reversal of 25725648740909 is 90904784652752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25725648740909 - 2¹² = 25725648736813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25725648740809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20670659 + ... + 21879840.

It is an arithmetic number, because the mean of its divisors is an integer number (3463142644500).

Almost surely, 2^{25725648740909} is an apocalyptic number.

It is an amenable number.

25725648740909 is a deficient number, since it is larger than the sum of its proper divisors (1979492415091).

25725648740909 is a wasteful number, since it uses less digits than its factorization.

25725648740909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42597019.

The product of its (nonzero) digits is 304819200, while the sum is 68.

The spelling of 25725648740909 in words is "twenty-five trillion, seven hundred twenty-five billion, six hundred forty-eight million, seven hundred forty thousand, nine hundred nine".