25495005556 has 12 divisors (see below), whose sum is σ = 44642378340. Its totient is φ = 12740040320.

The previous prime is 25495005533. The next prime is 25495005583. The reversal of 25495005556 is 65550059452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11720227600 + 13774777956 = 108260^2 + 117366^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1857925 + ... + 1871596.

It is an arithmetic number, because the mean of its divisors is an integer number (3720198195).

Almost surely, 2^25495005556 is an apocalyptic number.

It is an amenable number.

25495005556 is a deficient number, since it is larger than the sum of its proper divisors (19147372784).

25495005556 is a wasteful number, since it uses less digits than its factorization.

25495005556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731234 (or 3731232 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 46.

The spelling of 25495005556 in words is "twenty-five billion, four hundred ninety-five million, five thousand, five hundred fifty-six".