25554768512 has 144 divisors (see below), whose sum is σ = 64130309550. Its totient is φ = 10109159424.

The previous prime is 25554768497. The next prime is 25554768521. The reversal of 25554768512 is 21586745552.

It can be written as a sum of positive squares in 3 ways, for example, as 14482678336 + 11072090176 = 120344^2 + 105224^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1047914 + ... + 1072022.

Almost surely, 2^25554768512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25554768512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32065154775).

25554768512 is an abundant number, since it is smaller than the sum of its proper divisors (38575541038).

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

25554768512 is a wasteful number, since it uses less digits than its factorization.

25554768512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24163 (or 24131 counting only the distinct ones).

The product of its digits is 3360000, while the sum is 50.

The spelling of 25554768512 in words is "twenty-five billion, five hundred fifty-four million, seven hundred sixty-eight thousand, five hundred twelve".