25543054402121 has 8 divisors (see below), whose sum is σ = 26251287193824. Its totient is φ = 24838880251680.

The previous prime is 25543054402109. The next prime is 25543054402207. The reversal of 25543054402121 is 12120445034552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25543054402121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25543054402321) 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 7 ways as a sum of consecutive naturals, for example, 1014647555 + ... + 1014672728.

It is an arithmetic number, because the mean of its divisors is an integer number (3281410899228).

Almost surely, 2^{25543054402121} is an apocalyptic number.

It is an amenable number.

25543054402121 is a deficient number, since it is larger than the sum of its proper divisors (708232791703).

25543054402121 is a wasteful number, since it uses less digits than its factorization.

25543054402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029320631.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 25543054402121 its reverse (12120445034552), we get a palindrome (37663499436673).

The spelling of 25543054402121 in words is "twenty-five trillion, five hundred forty-three billion, fifty-four million, four hundred two thousand, one hundred twenty-one".