2505656125 has 16 divisors (see below), whose sum is σ = 3573782784. Its totient is φ = 1718163600.

The previous prime is 2505656123. The next prime is 2505656149. The reversal of 2505656125 is 5216565052.

It is not a de Polignac number, because 2505656125 - 2¹ = 2505656123 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505656123) 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 15 ways as a sum of consecutive naturals, for example, 1430929 + ... + 1432678.

It is an arithmetic number, because the mean of its divisors is an integer number (223361424).

Almost surely, 2^2505656125 is an apocalyptic number.

2505656125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2505656125 is a deficient number, since it is larger than the sum of its proper divisors (1068126659).

2505656125 is an equidigital number, since it uses as much as digits as its factorization.

2505656125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863629 (or 2863619 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 2505656125 is about 50056.5292943888. The cubic root of 2505656125 is about 1358.2315763870.

The spelling of 2505656125 in words is "two billion, five hundred five million, six hundred fifty-six thousand, one hundred twenty-five".