25120226520 has 128 divisors (see below), whose sum is σ = 83810865600. Its totient is φ = 6692585472.

The previous prime is 25120226507. The next prime is 25120226531. The reversal of 25120226520 is 2562202152.

25120226520 is a `hidden beast` number, since 2 + 5 + 1 + 2 + 0 + 2 + 2 + 652 + 0 = 666.

It is a super-2 number, since 2×25120226520² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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, 1235154 + ... + 1255326.

Almost surely, 2^25120226520 is an apocalyptic number.

25120226520 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 25120226520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41905432800).

25120226520 is an abundant number, since it is smaller than the sum of its proper divisors (58690639080).

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

25120226520 is a wasteful number, since it uses less digits than its factorization.

25120226520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21346 (or 21336 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 25120226520 its reverse (2562202152), we get a palindrome (27682428672).

The spelling of 25120226520 in words is "twenty-five billion, one hundred twenty million, two hundred twenty-six thousand, five hundred twenty".