2505611553 has 16 divisors (see below), whose sum is σ = 3383720256. Its totient is φ = 1648987200.

The previous prime is 2505611551. The next prime is 2505611573. The reversal of 2505611553 is 3551165052.

It is not a de Polignac number, because 2505611553 - 2¹ = 2505611551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2505611551) 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 15 ways as a sum of consecutive naturals, for example, 394503 + ... + 400803.

It is an arithmetic number, because the mean of its divisors is an integer number (211482516).

Almost surely, 2^2505611553 is an apocalyptic number.

It is an amenable number.

2505611553 is a deficient number, since it is larger than the sum of its proper divisors (878108703).

2505611553 is a wasteful number, since it uses less digits than its factorization.

2505611553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7984.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 2505611553 is about 50056.0840757645. The cubic root of 2505611553 is about 1358.2235226806.

The spelling of 2505611553 in words is "two billion, five hundred five million, six hundred eleven thousand, five hundred fifty-three".