25968406647 has 16 divisors (see below), whose sum is σ = 35955505152. Its totient is φ = 16653478560.

The previous prime is 25968406643. The next prime is 25968406649. The reversal of 25968406647 is 74660486952.

It is not a de Polignac number, because 25968406647 - 2² = 25968406643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25968406643) 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 15 ways as a sum of consecutive naturals, for example, 820488 + ... + 851549.

It is an arithmetic number, because the mean of its divisors is an integer number (2247219072).

Almost surely, 2^25968406647 is an apocalyptic number.

25968406647 is a deficient number, since it is larger than the sum of its proper divisors (9987098505).

25968406647 is a wasteful number, since it uses less digits than its factorization.

25968406647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672238.

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 25968406647 in words is "twenty-five billion, nine hundred sixty-eight million, four hundred six thousand, six hundred forty-seven".