25278030528 has 28 divisors (see below), whose sum is σ = 66881456280. Its totient is φ = 8426010112.

The previous prime is 25278030527. The next prime is 25278030581. The reversal of 25278030528 is 82503087252.

It is a self number, because there is not a number n which added to its sum of digits gives 25278030528.

It is not an unprimeable number, because it can be changed into a prime (25278030527) 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 3 ways as a sum of consecutive naturals, for example, 65828013 + ... + 65828396.

Almost surely, 2^25278030528 is an apocalyptic number.

It is an amenable number.

25278030528 is an abundant number, since it is smaller than the sum of its proper divisors (41603425752).

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

25278030528 is a wasteful number, since it uses less digits than its factorization.

25278030528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131656424 (or 131656414 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 25278030528 in words is "twenty-five billion, two hundred seventy-eight million, thirty thousand, five hundred twenty-eight".