25505552528 has 10 divisors (see below), whose sum is σ = 49417008054. Its totient is φ = 12752776256.

The previous prime is 25505552521. The next prime is 25505552537. The reversal of 25505552528 is 82525550552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20086825984 + 5418726544 = 141728^2 + 73612^2 .

It is not an unprimeable number, because it can be changed into a prime (25505552521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 797048501 + ... + 797048532.

Almost surely, 2^25505552528 is an apocalyptic number.

It is an amenable number.

25505552528 is a deficient number, since it is larger than the sum of its proper divisors (23911455526).

25505552528 is a wasteful number, since it uses less digits than its factorization.

25505552528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594097041 (or 1594097035 counting only the distinct ones).

The product of its (nonzero) digits is 1000000, while the sum is 44.

The spelling of 25505552528 in words is "twenty-five billion, five hundred five million, five hundred fifty-two thousand, five hundred twenty-eight".