2525252778 has 24 divisors (see below), whose sum is σ = 5660050500. Its totient is φ = 812724864.

The previous prime is 2525252773. The next prime is 2525252783. The reversal of 2525252778 is 8772525252.

2525252778 is a `hidden beast` number, since 2 + 5 + 2 + 52 + 527 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (2525252773) and next prime (2525252783).

It can be written as a sum of positive squares in 2 ways, for example, as 2518734969 + 6517809 = 50187^2 + 2553^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2525252773) 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, 2418303 + ... + 2419346.

Almost surely, 2^2525252778 is an apocalyptic number.

2525252778 is an abundant number, since it is smaller than the sum of its proper divisors (3134797722).

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

2525252778 is a wasteful number, since it uses less digits than its factorization.

2525252778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4837686 (or 4837683 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 2525252778 is about 50251.8932777662. The cubic root of 2525252778 is about 1361.7632798375.

The spelling of 2525252778 in words is "two billion, five hundred twenty-five million, two hundred fifty-two thousand, seven hundred seventy-eight".