25143253402540 has 192 divisors, whose sum is σ = 66482436384000. Its totient is φ = 7936958195712.

The previous prime is 25143253402537. The next prime is 25143253402541. The reversal of 25143253402540 is 4520435234152.

It is a junction number, because it is equal to n+sod(n) for n = 25143253402493 and 25143253402502.

It is not an unprimeable number, because it can be changed into a prime (25143253402541) 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, 34328632 + ... + 35053408.

It is an arithmetic number, because the mean of its divisors is an integer number (346262689500).

Almost surely, 2^{25143253402540} is an apocalyptic number.

25143253402540 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 25143253402540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33241218192000).

25143253402540 is an abundant number, since it is smaller than the sum of its proper divisors (41339182981460).

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

25143253402540 is a wasteful number, since it uses less digits than its factorization.

25143253402540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725209 (or 725193 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 25143253402540 its reverse (4520435234152), we get a palindrome (29663688636692).

The spelling of 25143253402540 in words is "twenty-five trillion, one hundred forty-three billion, two hundred fifty-three million, four hundred two thousand, five hundred forty".