25553530368 has 120 divisors (see below), whose sum is σ = 73825302408. Its totient is φ = 8509059072.

The previous prime is 25553530367. The next prime is 25553530393. The reversal of 25553530368 is 86303535552.

25553530368 is a `hidden beast` number, since 2 + 5 + 5 + 53 + 530 + 3 + 68 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25553530367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5697855 + ... + 5702337.

Almost surely, 2^25553530368 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 25553530368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36912651204).

25553530368 is an abundant number, since it is smaller than the sum of its proper divisors (48271772040).

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

25553530368 is a wasteful number, since it uses less digits than its factorization.

25553530368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744 (or 5725 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

The spelling of 25553530368 in words is "twenty-five billion, five hundred fifty-three million, five hundred thirty thousand, three hundred sixty-eight".