2550903561 has 6 divisors (see below), whose sum is σ = 3684638490. Its totient is φ = 1700602368.

The previous prime is 2550903547. The next prime is 2550903569. The reversal of 2550903561 is 1653090552.

2550903561 is a `hidden beast` number, since 2 + 5 + 5 + 0 + 90 + 3 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1808885961 + 742017600 = 42531^2 + 27240^2 .

It is not a de Polignac number, because 2550903561 - 2⁶ = 2550903497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2550903569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141716856 + ... + 141716873.

It is an arithmetic number, because the mean of its divisors is an integer number (614106415).

Almost surely, 2^2550903561 is an apocalyptic number.

It is an amenable number.

2550903561 is a deficient number, since it is larger than the sum of its proper divisors (1133734929).

2550903561 is a wasteful number, since it uses less digits than its factorization.

2550903561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283433735 (or 283433732 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 2550903561 is about 50506.4704864634. The cubic root of 2550903561 is about 1366.3585540265.

The spelling of 2550903561 in words is "two billion, five hundred fifty million, nine hundred three thousand, five hundred sixty-one".