2506556550 has 24 divisors (see below), whose sum is σ = 6216260616. Its totient is φ = 668415040.

The previous prime is 2506556539. The next prime is 2506556557. The reversal of 2506556550 is 556556052.

It is a junction number, because it is equal to n+sod(n) for n = 2506556499 and 2506556508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506556557) 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 11 ways as a sum of consecutive naturals, for example, 8355039 + ... + 8355338.

It is an arithmetic number, because the mean of its divisors is an integer number (259010859).

Almost surely, 2^2506556550 is an apocalyptic number.

2506556550 is an abundant number, since it is smaller than the sum of its proper divisors (3709704066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2506556550 is a wasteful number, since it uses less digits than its factorization.

2506556550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16710392 (or 16710387 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 39.

The square root of 2506556550 is about 50065.5225679309. The cubic root of 2506556550 is about 1358.3942535648.

The spelling of 2506556550 in words is "two billion, five hundred six million, five hundred fifty-six thousand, five hundred fifty".