25500005555 has 16 divisors (see below), whose sum is σ = 32075344224. Its totient is φ = 19439589120.

The previous prime is 25500005549. The next prime is 25500005569. The reversal of 25500005555 is 55550000552.

It is not a de Polignac number, because 25500005555 - 2¹⁰ = 25500004531 is a prime.

It is a Duffinian number.

25500005555 is a modest number, since divided by 5555 gives 255 as remainder.

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 15 ways as a sum of consecutive naturals, for example, 1437584 + ... + 1455213.

It is an arithmetic number, because the mean of its divisors is an integer number (2004709014).

Almost surely, 2^25500005555 is an apocalyptic number.

25500005555 is a deficient number, since it is larger than the sum of its proper divisors (6575338669).

25500005555 is a wasteful number, since it uses less digits than its factorization.

25500005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892886.

The product of its (nonzero) digits is 31250, while the sum is 32.

The spelling of 25500005555 in words is "twenty-five billion, five hundred million, five thousand, five hundred fifty-five".