25502504820 has 96 divisors (see below), whose sum is σ = 76956687360. Its totient is φ = 6272901120.

The previous prime is 25502504761. The next prime is 25502504821. The reversal of 25502504820 is 2840520552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25502504821) 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 31 ways as a sum of consecutive naturals, for example, 1111060 + ... + 1133780.

It is an arithmetic number, because the mean of its divisors is an integer number (801632160).

Almost surely, 2^25502504820 is an apocalyptic number.

25502504820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25502504820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38478343680).

25502504820 is an abundant number, since it is smaller than the sum of its proper divisors (51454182540).

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

25502504820 is a wasteful number, since it uses less digits than its factorization.

25502504820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24185 (or 24183 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 25502504820 in words is "twenty-five billion, five hundred two million, five hundred four thousand, eight hundred twenty".