25528025012 has 12 divisors (see below), whose sum is σ = 51056050080. Its totient is φ = 10940582136.

The previous prime is 25528024969. The next prime is 25528025053. The reversal of 25528025012 is 21052082552.

25528025012 is an admirable number.

It is a super-2 number, since 2×25528025012² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25528025012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455857562 + ... + 455857617.

It is an arithmetic number, because the mean of its divisors is an integer number (4254670840).

Almost surely, 2^25528025012 is an apocalyptic number.

It is an amenable number.

25528025012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25528025012 is a wasteful number, since it uses less digits than its factorization.

25528025012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911715190 (or 911715188 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 25528025012 in words is "twenty-five billion, five hundred twenty-eight million, twenty-five thousand, twelve".