25234402553543 has 4 divisors (see below), whose sum is σ = 25234580701968. Its totient is φ = 25234224405120.

The previous prime is 25234402553531. The next prime is 25234402553561. The reversal of 25234402553543 is 34535520443252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25234402553543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25234402550543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88861571 + ... + 89145092.

It is an arithmetic number, because the mean of its divisors is an integer number (6308645175492).

Almost surely, 2^{25234402553543} is an apocalyptic number.

25234402553543 is a deficient number, since it is larger than the sum of its proper divisors (178148425).

25234402553543 is a wasteful number, since it uses less digits than its factorization.

25234402553543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178148424.

The product of its (nonzero) digits is 8640000, while the sum is 47.

Adding to 25234402553543 its reverse (34535520443252), we get a palindrome (59769922996795).

The spelling of 25234402553543 in words is "twenty-five trillion, two hundred thirty-four billion, four hundred two million, five hundred fifty-three thousand, five hundred forty-three".