25532404121 has 16 divisors (see below), whose sum is σ = 30488120064. Its totient is φ = 20906217024.

The previous prime is 25532404097. The next prime is 25532404129. The reversal of 25532404121 is 12140423552.

It is a de Polignac number, because none of the positive numbers 2^k-25532404121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25532404129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21875 + ... + 227031.

It is an arithmetic number, because the mean of its divisors is an integer number (1905507504).

Almost surely, 2^25532404121 is an apocalyptic number.

It is an amenable number.

25532404121 is a deficient number, since it is larger than the sum of its proper divisors (4955715943).

25532404121 is a wasteful number, since it uses less digits than its factorization.

25532404121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205960.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 25532404121 its reverse (12140423552), we get a palindrome (37672827673).

The spelling of 25532404121 in words is "twenty-five billion, five hundred thirty-two million, four hundred four thousand, one hundred twenty-one".