25564451312 has 20 divisors (see below), whose sum is σ = 50584979616. Its totient is φ = 12510263040.

The previous prime is 25564451293. The next prime is 25564451383. The reversal of 25564451312 is 21315446552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16996889 + ... + 16998392.

Almost surely, 2^25564451312 is an apocalyptic number.

It is an amenable number.

25564451312 is a deficient number, since it is larger than the sum of its proper divisors (25020528304).

25564451312 is a wasteful number, since it uses less digits than its factorization.

25564451312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33995336 (or 33995330 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

Adding to 25564451312 its reverse (21315446552), we get a palindrome (46879897864).

The spelling of 25564451312 in words is "twenty-five billion, five hundred sixty-four million, four hundred fifty-one thousand, three hundred twelve".