25130528778 has 16 divisors (see below), whose sum is σ = 52446321216. Its totient is φ = 8012632320.

The previous prime is 25130528729. The next prime is 25130528803. The reversal of 25130528778 is 87782503152.

It is an unprimeable number.

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, 91052503 + ... + 91052778.

It is an arithmetic number, because the mean of its divisors is an integer number (3277895076).

Almost surely, 2^25130528778 is an apocalyptic number.

25130528778 is an abundant number, since it is smaller than the sum of its proper divisors (27315792438).

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

25130528778 is a wasteful number, since it uses less digits than its factorization.

25130528778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182105309.

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 25130528778 in words is "twenty-five billion, one hundred thirty million, five hundred twenty-eight thousand, seven hundred seventy-eight".