25511323127 has 4 divisors (see below), whose sum is σ = 25523549136. Its totient is φ = 25499097120.

The previous prime is 25511323121. The next prime is 25511323129. The reversal of 25511323127 is 72132311552.

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

It is a cyclic number.

It is not a de Polignac number, because 25511323127 - 2¹⁶ = 25511257591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25511323093 and 25511323102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25511323121) 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, 6109874 + ... + 6114047.

It is an arithmetic number, because the mean of its divisors is an integer number (6380887284).

Almost surely, 2^25511323127 is an apocalyptic number.

25511323127 is a deficient number, since it is larger than the sum of its proper divisors (12226009).

25511323127 is a wasteful number, since it uses less digits than its factorization.

25511323127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12226008.

The product of its digits is 12600, while the sum is 32.

Adding to 25511323127 its reverse (72132311552), we get a palindrome (97643634679).

The spelling of 25511323127 in words is "twenty-five billion, five hundred eleven million, three hundred twenty-three thousand, one hundred twenty-seven".