25115187240 has 896 divisors, whose sum is σ = 105106377600. Its totient is φ = 5307586560.

The previous prime is 25115187233. The next prime is 25115187271. The reversal of 25115187240 is 4278151152.

It is a happy number.

25115187240 is a `hidden beast` number, since 25 + 11 + 518 + 72 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25115187195 and 25115187204.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 79227562 + ... + 79227878.

It is an arithmetic number, because the mean of its divisors is an integer number (117306225).

Almost surely, 2^25115187240 is an apocalyptic number.

25115187240 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 25115187240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52553188800).

25115187240 is an abundant number, since it is smaller than the sum of its proper divisors (79991190360).

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

25115187240 is a wasteful number, since it uses less digits than its factorization.

25115187240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 25115187240 in words is "twenty-five billion, one hundred fifteen million, one hundred eighty-seven thousand, two hundred forty".