25542514204240 has 160 divisors (see below), whose sum is σ = 65904138293760. Its totient is φ = 9129094656000.

The previous prime is 25542514204219. The next prime is 25542514204279. The reversal of 25542514204240 is 4240241524552.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 25542514204193 and 25542514204202.

It is a congruent number.

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, 11127721 + ... + 13225399.

It is an arithmetic number, because the mean of its divisors is an integer number (411900864336).

Almost surely, 2^{25542514204240} is an apocalyptic number.

25542514204240 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 25542514204240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32952069146880).

25542514204240 is an abundant number, since it is smaller than the sum of its proper divisors (40361624089520).

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

25542514204240 is a wasteful number, since it uses less digits than its factorization.

25542514204240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097941 (or 2097935 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 40.

Adding to 25542514204240 its reverse (4240241524552), we get a palindrome (29782755728792).

The spelling of 25542514204240 in words is "twenty-five trillion, five hundred forty-two billion, five hundred fourteen million, two hundred four thousand, two hundred forty".