25668743648 has 48 divisors (see below), whose sum is σ = 51189304320. Its totient is φ = 12669321600.

The previous prime is 25668743647. The next prime is 25668743651. The reversal of 25668743648 is 84634786652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25668743641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784643 + ... + 816701.

It is an arithmetic number, because the mean of its divisors is an integer number (1066443840).

Almost surely, 2^25668743648 is an apocalyptic number.

It is an amenable number.

25668743648 is a deficient number, since it is larger than the sum of its proper divisors (25520560672).

25668743648 is a wasteful number, since it uses less digits than its factorization.

25668743648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32391 (or 32383 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 59.

The spelling of 25668743648 in words is "twenty-five billion, six hundred sixty-eight million, seven hundred forty-three thousand, six hundred forty-eight".