25520805352 has 32 divisors (see below), whose sum is σ = 56165483520. Its totient is φ = 10641879360.

The previous prime is 25520805319. The next prime is 25520805353. The reversal of 25520805352 is 25350802552.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (25520805353) 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, 6156424 + ... + 6160567.

It is an arithmetic number, because the mean of its divisors is an integer number (1755171360).

Almost surely, 2^25520805352 is an apocalyptic number.

It is an amenable number.

25520805352 is an abundant number, since it is smaller than the sum of its proper divisors (30644678168).

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

25520805352 is a wasteful number, since it uses less digits than its factorization.

25520805352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12317041 (or 12317037 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 25520805352 in words is "twenty-five billion, five hundred twenty million, eight hundred five thousand, three hundred fifty-two".