25695056520 has 320 divisors, whose sum is σ = 99958003200. Its totient is φ = 5798407680.

The previous prime is 25695056507. The next prime is 25695056531. The reversal of 25695056520 is 2565059652.

25695056520 is a `hidden beast` number, since 2 + 5 + 69 + 5 + 0 + 565 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 1784550 + ... + 1798890.

It is an arithmetic number, because the mean of its divisors is an integer number (312368760).

Almost surely, 2^25695056520 is an apocalyptic number.

25695056520 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 25695056520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49979001600).

25695056520 is an abundant number, since it is smaller than the sum of its proper divisors (74262946680).

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

25695056520 is a wasteful number, since it uses less digits than its factorization.

25695056520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14450 (or 14437 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

It can be divided in two parts, 2569505 and 6520, that added together give a square (2576025 = 1605²).

The spelling of 25695056520 in words is "twenty-five billion, six hundred ninety-five million, fifty-six thousand, five hundred twenty".