25303717440 has 448 divisors, whose sum is σ = 93021546240. Its totient is φ = 6469632000.

The previous prime is 25303717433. The next prime is 25303717471. The reversal of 25303717440 is 4471730352.

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 = 25303717395 and 25303717404.

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, 21608055 + ... + 21609225.

It is an arithmetic number, because the mean of its divisors is an integer number (207637380).

Almost surely, 2^25303717440 is an apocalyptic number.

25303717440 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 25303717440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46510773120).

25303717440 is an abundant number, since it is smaller than the sum of its proper divisors (67717828800).

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

25303717440 is a wasteful number, since it uses less digits than its factorization.

25303717440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 25303717440 in words is "twenty-five billion, three hundred three million, seven hundred seventeen thousand, four hundred forty".