25115709960 has 512 divisors, whose sum is σ = 94142476800. Its totient is φ = 5904138240.

The previous prime is 25115709953. The next prime is 25115709961. The reversal of 25115709960 is 6990751152.

25115709960 is a `hidden beast` number, since 2 + 5 + 11 + 570 + 9 + 9 + 60 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (25115709961) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 71149144 + ... + 71149496.

It is an arithmetic number, because the mean of its divisors is an integer number (183872025).

Almost surely, 2^25115709960 is an apocalyptic number.

25115709960 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 25115709960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47071238400).

25115709960 is an abundant number, since it is smaller than the sum of its proper divisors (69026766840).

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

25115709960 is a wasteful number, since it uses less digits than its factorization.

25115709960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 45.

The spelling of 25115709960 in words is "twenty-five billion, one hundred fifteen million, seven hundred nine thousand, nine hundred sixty".