25638052530 has 16 divisors (see below), whose sum is σ = 61531326144. Its totient is φ = 6836814000.

The previous prime is 25638052471. The next prime is 25638052537. The reversal of 25638052530 is 3525083652.

It is not an unprimeable number, because it can be changed into a prime (25638052537) 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, 427300846 + ... + 427300905.

It is an arithmetic number, because the mean of its divisors is an integer number (3845707884).

Almost surely, 2^25638052530 is an apocalyptic number.

25638052530 is an abundant number, since it is smaller than the sum of its proper divisors (35893273614).

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

25638052530 is a wasteful number, since it uses less digits than its factorization.

25638052530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854601761.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 25638052530 in words is "twenty-five billion, six hundred thirty-eight million, fifty-two thousand, five hundred thirty".