25351435064440 has 128 divisors (see below), whose sum is σ = 59206753267200. Its totient is φ = 9764266636800.

The previous prime is 25351435064393. The next prime is 25351435064441. The reversal of 25351435064440 is 4446053415352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25351435064441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26092891 + ... + 27047029.

It is an arithmetic number, because the mean of its divisors is an integer number (462552759900).

Almost surely, 2^{25351435064440} is an apocalyptic number.

25351435064440 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 25351435064440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29603376633600).

25351435064440 is an abundant number, since it is smaller than the sum of its proper divisors (33855318202760).

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

25351435064440 is a wasteful number, since it uses less digits than its factorization.

25351435064440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954437 (or 954433 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 46.

Adding to 25351435064440 its reverse (4446053415352), we get a palindrome (29797488479792).

The spelling of 25351435064440 in words is "twenty-five trillion, three hundred fifty-one billion, four hundred thirty-five million, sixty-four thousand, four hundred forty".