25555005530 has 16 divisors (see below), whose sum is σ = 46001688264. Its totient is φ = 10221407040.

The previous prime is 25555005517. The next prime is 25555005547. The reversal of 25555005530 is 3550055552.

It can be written as a sum of positive squares in 4 ways, for example, as 20388127369 + 5166878161 = 142787^2 + 71881^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133640 + ... + 262620.

Almost surely, 2^25555005530 is an apocalyptic number.

25555005530 is a deficient number, since it is larger than the sum of its proper divisors (20446682734).

25555005530 is a wasteful number, since it uses less digits than its factorization.

25555005530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148801.

The product of its (nonzero) digits is 93750, while the sum is 35.

The spelling of 25555005530 in words is "twenty-five billion, five hundred fifty-five million, five thousand, five hundred thirty".