25555002556 has 12 divisors (see below), whose sum is σ = 44787709792. Its totient is φ = 12758514048.

The previous prime is 25555002553. The next prime is 25555002593. The reversal of 25555002556 is 65520055552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555002553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4743780 + ... + 4749163.

Almost surely, 2^25555002556 is an apocalyptic number.

It is an amenable number.

25555002556 is a deficient number, since it is larger than the sum of its proper divisors (19232707236).

25555002556 is a wasteful number, since it uses less digits than its factorization.

25555002556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9493620 (or 9493618 counting only the distinct ones).

The product of its (nonzero) digits is 375000, while the sum is 40.

The spelling of 25555002556 in words is "twenty-five billion, five hundred fifty-five million, two thousand, five hundred fifty-six".