25250312520 has 128 divisors (see below), whose sum is σ = 84529785600. Its totient is φ = 6704451072.

The previous prime is 25250312501. The next prime is 25250312531. The reversal of 25250312520 is 2521305252.

25250312520 is a `hidden beast` number, since 252 + 50 + 312 + 52 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201469 + ... + 301811.

It is an arithmetic number, because the mean of its divisors is an integer number (660388950).

Almost surely, 2^25250312520 is an apocalyptic number.

25250312520 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 25250312520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42264892800).

25250312520 is an abundant number, since it is smaller than the sum of its proper divisors (59279473080).

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

25250312520 is a wasteful number, since it uses less digits than its factorization.

25250312520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100596 (or 100586 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 25250312520 its reverse (2521305252), we get a palindrome (27771617772).

The spelling of 25250312520 in words is "twenty-five billion, two hundred fifty million, three hundred twelve thousand, five hundred twenty".