25545534550 has 24 divisors (see below), whose sum is σ = 47777223312. Its totient is φ = 10161756000.

The previous prime is 25545534541. The next prime is 25545534583. The reversal of 25545534550 is 5543554552.

It is a junction number, because it is equal to n+sod(n) for n = 25545534497 and 25545534506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1402306 + ... + 1420405.

It is an arithmetic number, because the mean of its divisors is an integer number (1990717638).

Almost surely, 2^25545534550 is an apocalyptic number.

25545534550 is a deficient number, since it is larger than the sum of its proper divisors (22231688762).

25545534550 is a wasteful number, since it uses less digits than its factorization.

25545534550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822904 (or 2822899 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 43.

The spelling of 25545534550 in words is "twenty-five billion, five hundred forty-five million, five hundred thirty-four thousand, five hundred fifty".