25555050550 has 24 divisors (see below), whose sum is σ = 48338033400. Its totient is φ = 10048764480.

The previous prime is 25555050541. The next prime is 25555050557. The reversal of 25555050550 is 5505055552.

It is a super-2 number, since 2×25555050550² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555050557) 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 11 ways as a sum of consecutive naturals, for example, 4328415 + ... + 4334314.

It is an arithmetic number, because the mean of its divisors is an integer number (2014084725).

Almost surely, 2^25555050550 is an apocalyptic number.

25555050550 is a deficient number, since it is larger than the sum of its proper divisors (22782982850).

25555050550 is a wasteful number, since it uses less digits than its factorization.

25555050550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662800 (or 8662795 counting only the distinct ones).

The product of its (nonzero) digits is 156250, while the sum is 37.

The spelling of 25555050550 in words is "twenty-five billion, five hundred fifty-five million, fifty thousand, five hundred fifty".