2505025778 has 16 divisors (see below), whose sum is σ = 3964140000. Its totient is φ = 1183940352.

The previous prime is 2505025777. The next prime is 2505025781. The reversal of 2505025778 is 8775205052.

It is not an unprimeable number, because it can be changed into a prime (2505025777) 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 7 ways as a sum of consecutive naturals, for example, 56348 + ... + 90471.

It is an arithmetic number, because the mean of its divisors is an integer number (247758750).

Almost surely, 2^2505025778 is an apocalyptic number.

2505025778 is a deficient number, since it is larger than the sum of its proper divisors (1459114222).

2505025778 is a wasteful number, since it uses less digits than its factorization.

2505025778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147289.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 2505025778 is about 50050.2325469123. The cubic root of 2505025778 is about 1358.1176702268.

The spelling of 2505025778 in words is "two billion, five hundred five million, twenty-five thousand, seven hundred seventy-eight".