25667043648 has 28 divisors (see below), whose sum is σ = 67910720160. Its totient is φ = 8555681152.

The previous prime is 25667043643. The next prime is 25667043653. The reversal of 25667043648 is 84634076652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25667043643) and next prime (25667043653).

It is a self number, because there is not a number n which added to its sum of digits gives 25667043648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25667043643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66841068 + ... + 66841451.

Almost surely, 2^25667043648 is an apocalyptic number.

It is an amenable number.

25667043648 is an abundant number, since it is smaller than the sum of its proper divisors (42243676512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25667043648 is a wasteful number, since it uses less digits than its factorization.

25667043648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133682534 (or 133682524 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 51.

The spelling of 25667043648 in words is "twenty-five billion, six hundred sixty-seven million, forty-three thousand, six hundred forty-eight".