25501103420240 has 160 divisors (see below), whose sum is σ = 68349256200960. Its totient is φ = 8667469504512.

The previous prime is 25501103420239. The next prime is 25501103420251. The reversal of 25501103420240 is 4202430110552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37734431 + ... + 38404289.

It is an arithmetic number, because the mean of its divisors is an integer number (427182851256).

Almost surely, 2^{25501103420240} is an apocalyptic number.

25501103420240 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 25501103420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34174628100480).

25501103420240 is an abundant number, since it is smaller than the sum of its proper divisors (42848152780720).

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

25501103420240 is a wasteful number, since it uses less digits than its factorization.

25501103420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670469 (or 670463 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 25501103420240 its reverse (4202430110552), we get a palindrome (29703533530792).

The spelling of 25501103420240 in words is "twenty-five trillion, five hundred one billion, one hundred three million, four hundred twenty thousand, two hundred forty".