25440215043500 has 96 divisors (see below), whose sum is σ = 58531328593920. Its totient is φ = 9632983896000.

The previous prime is 25440215043493. The next prime is 25440215043511. The reversal of 25440215043500 is 534051204452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11144885 + ... + 13232115.

It is an arithmetic number, because the mean of its divisors is an integer number (609701339520).

Almost surely, 2^{25440215043500} is an apocalyptic number.

25440215043500 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 25440215043500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29265664296960).

25440215043500 is an abundant number, since it is smaller than the sum of its proper divisors (33091113550420).

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

25440215043500 is a wasteful number, since it uses less digits than its factorization.

25440215043500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088552 (or 2088540 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 25440215043500 its reverse (534051204452), we get a palindrome (25974266247952).

The spelling of 25440215043500 in words is "twenty-five trillion, four hundred forty billion, two hundred fifteen million, forty-three thousand, five hundred".