25543012141 has 4 divisors (see below), whose sum is σ = 25543489500. Its totient is φ = 25542534784.

The previous prime is 25543012111. The next prime is 25543012147. The reversal of 25543012141 is 14121034552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24907468041 + 635544100 = 157821^2 + 25210^2 .

It is a cyclic number.

It is not a de Polignac number, because 25543012141 - 2²³ = 25534623533 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 (25543012147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 146566 + ... + 269383.

It is an arithmetic number, because the mean of its divisors is an integer number (6385872375).

Almost surely, 2^25543012141 is an apocalyptic number.

It is an amenable number.

25543012141 is a deficient number, since it is larger than the sum of its proper divisors (477359).

25543012141 is an equidigital number, since it uses as much as digits as its factorization.

25543012141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477358.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 25543012141 its reverse (14121034552), we get a palindrome (39664046693).

The spelling of 25543012141 in words is "twenty-five billion, five hundred forty-three million, twelve thousand, one hundred forty-one".