25215320240000 has 320 divisors, whose sum is σ = 68519073815280. Its totient is φ = 9163776000000.

The previous prime is 25215320239987. The next prime is 25215320240023. The reversal of 25215320240000 is 4202351252.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1672872464 + ... + 1672887536.

Almost surely, 2^{25215320240000} is an apocalyptic number.

25215320240000 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 25215320240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34259536907640).

25215320240000 is an abundant number, since it is smaller than the sum of its proper divisors (43303753575280).

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

25215320240000 is a wasteful number, since it uses less digits than its factorization.

25215320240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17019 (or 16992 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 25215320240000 its reverse (4202351252), we get a palindrome (25219522591252).

The spelling of 25215320240000 in words is "twenty-five trillion, two hundred fifteen billion, three hundred twenty million, two hundred forty thousand".