25530025028 has 6 divisors (see below), whose sum is σ = 44677543806. Its totient is φ = 12765012512.

The previous prime is 25530024953. The next prime is 25530025151. The reversal of 25530025028 is 82052003552.

It can be written as a sum of positive squares in only one way, i.e., 21404275204 + 4125749824 = 146302^2 + 64232^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25530024985 and 25530025003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3191253125 + ... + 3191253132.

It is an arithmetic number, because the mean of its divisors is an integer number (7446257301).

Almost surely, 2^25530025028 is an apocalyptic number.

It is an amenable number.

25530025028 is a deficient number, since it is larger than the sum of its proper divisors (19147518778).

25530025028 is a wasteful number, since it uses less digits than its factorization.

25530025028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382506261 (or 6382506259 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 25530025028 in words is "twenty-five billion, five hundred thirty million, twenty-five thousand, twenty-eight".