25555550530 has 8 divisors (see below), whose sum is σ = 45999990972. Its totient is φ = 10222220208.

The previous prime is 25555550521. The next prime is 25555550533. The reversal of 25555550530 is 3505555552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24072453409 + 1483097121 = 155153^2 + 38511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25555550533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1277777517 + ... + 1277777536.

Almost surely, 2^25555550530 is an apocalyptic number.

25555550530 is a deficient number, since it is larger than the sum of its proper divisors (20444440442).

25555550530 is a wasteful number, since it uses less digits than its factorization.

25555550530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555555060.

The product of its (nonzero) digits is 468750, while the sum is 40.

The spelling of 25555550530 in words is "twenty-five billion, five hundred fifty-five million, five hundred fifty thousand, five hundred thirty".