25533638552 has 64 divisors (see below), whose sum is σ = 50203722240. Its totient is φ = 12164051200.

The previous prime is 25533638551. The next prime is 25533638567. The reversal of 25533638552 is 25583633552.

It is a junction number, because it is equal to n+sod(n) for n = 25533638497 and 25533638506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25533638551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2486693 + ... + 2496939.

It is an arithmetic number, because the mean of its divisors is an integer number (784433160).

Almost surely, 2^25533638552 is an apocalyptic number.

It is an amenable number.

25533638552 is a deficient number, since it is larger than the sum of its proper divisors (24670083688).

25533638552 is a wasteful number, since it uses less digits than its factorization.

25533638552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10472 (or 10468 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 47.

Subtracting 25533638552 from its reverse (25583633552), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 25533638552 in words is "twenty-five billion, five hundred thirty-three million, six hundred thirty-eight thousand, five hundred fifty-two".