25544578530 has 16 divisors (see below), whose sum is σ = 61306988544. Its totient is φ = 6811887600.

The previous prime is 25544578523. The next prime is 25544578531. The reversal of 25544578530 is 3587544552.

It is a self number, because there is not a number n which added to its sum of digits gives 25544578530.

It is not an unprimeable number, because it can be changed into a prime (25544578531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425742946 + ... + 425743005.

It is an arithmetic number, because the mean of its divisors is an integer number (3831686784).

Almost surely, 2^25544578530 is an apocalyptic number.

25544578530 is an abundant number, since it is smaller than the sum of its proper divisors (35762410014).

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

25544578530 is a wasteful number, since it uses less digits than its factorization.

25544578530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851485961.

The product of its (nonzero) digits is 3360000, while the sum is 48.

The spelling of 25544578530 in words is "twenty-five billion, five hundred forty-four million, five hundred seventy-eight thousand, five hundred thirty".