25040522520 has 256 divisors, whose sum is σ = 90364579200. Its totient is φ = 6131220480.

The previous prime is 25040522513. The next prime is 25040522543. The reversal of 25040522520 is 2522504052.

25040522520 is a `hidden beast` number, since 2 + 5 + 0 + 405 + 2 + 252 + 0 = 666.

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 (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2705100 + ... + 2714340.

Almost surely, 2^25040522520 is an apocalyptic number.

25040522520 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 25040522520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45182289600).

25040522520 is an abundant number, since it is smaller than the sum of its proper divisors (65324056680).

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

25040522520 is a wasteful number, since it uses less digits than its factorization.

25040522520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9467 (or 9457 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The spelling of 25040522520 in words is "twenty-five billion, forty million, five hundred twenty-two thousand, five hundred twenty".