25143400520340 has 192 divisors, whose sum is σ = 77266700679168. Its totient is φ = 6081594163200.

The previous prime is 25143400520311. The next prime is 25143400520347. The reversal of 25143400520340 is 4302500434152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25143400520347) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5970682 + ... + 9270158.

It is an arithmetic number, because the mean of its divisors is an integer number (402430732704).

Almost surely, 2^{25143400520340} is an apocalyptic number.

25143400520340 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 25143400520340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38633350339584).

25143400520340 is an abundant number, since it is smaller than the sum of its proper divisors (52123300158828).

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

25143400520340 is a wasteful number, since it uses less digits than its factorization.

25143400520340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299778 (or 3299776 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 25143400520340 its reverse (4302500434152), we get a palindrome (29445900954492).

The spelling of 25143400520340 in words is "twenty-five trillion, one hundred forty-three billion, four hundred million, five hundred twenty thousand, three hundred forty".