25500250530 has 48 divisors (see below), whose sum is σ = 67917750264. Its totient is φ = 6634210560.

The previous prime is 25500250459. The next prime is 25500250543. The reversal of 25500250530 is 3505200552.

It can be written as a sum of positive squares in 4 ways, for example, as 6187867569 + 19312382961 = 78663^2 + 138969^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25500250494 and 25500250503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3451629 + ... + 3459008.

Almost surely, 2^25500250530 is an apocalyptic number.

25500250530 is an abundant number, since it is smaller than the sum of its proper divisors (42417499734).

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

25500250530 is a wasteful number, since it uses less digits than its factorization.

25500250530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910691 (or 6910688 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The spelling of 25500250530 in words is "twenty-five billion, five hundred million, two hundred fifty thousand, five hundred thirty".