25505500512 has 48 divisors (see below), whose sum is σ = 66978258480. Its totient is φ = 8498491392.

The previous prime is 25505500483. The next prime is 25505500549. The reversal of 25505500512 is 21500550552.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25505500512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199548 + ... + 301380.

It is an arithmetic number, because the mean of its divisors is an integer number (1395380385).

Almost surely, 2^25505500512 is an apocalyptic number.

It is an amenable number.

25505500512 is an abundant number, since it is smaller than the sum of its proper divisors (41472757968).

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

25505500512 is a wasteful number, since it uses less digits than its factorization.

25505500512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104455 (or 104447 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The spelling of 25505500512 in words is "twenty-five billion, five hundred five million, five hundred thousand, five hundred twelve".