25505575558 has 16 divisors (see below), whose sum is σ = 41063775120. Its totient is φ = 11838203136.

The previous prime is 25505575549. The next prime is 25505575559. The reversal of 25505575558 is 85557550552.

It is a super-3 number, since 3×25505575558³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505575559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5135628 + ... + 5140591.

It is an arithmetic number, because the mean of its divisors is an integer number (2566485945).

Almost surely, 2^25505575558 is an apocalyptic number.

25505575558 is a deficient number, since it is larger than the sum of its proper divisors (15558199562).

25505575558 is a wasteful number, since it uses less digits than its factorization.

25505575558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276311.

The product of its (nonzero) digits is 8750000, while the sum is 52.

The spelling of 25505575558 in words is "twenty-five billion, five hundred five million, five hundred seventy-five thousand, five hundred fifty-eight".