25550011133 has 4 divisors (see below), whose sum is σ = 25581056928. Its totient is φ = 25518965340.

The previous prime is 25550011121. The next prime is 25550011141. The reversal of 25550011133 is 33111005552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25550011133 - 2³⁰ = 24476269309 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 (25550011033) 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, 15521663 + ... + 15523308.

It is an arithmetic number, because the mean of its divisors is an integer number (6395264232).

Almost surely, 2^25550011133 is an apocalyptic number.

It is an amenable number.

25550011133 is a deficient number, since it is larger than the sum of its proper divisors (31045795).

25550011133 is an equidigital number, since it uses as much as digits as its factorization.

25550011133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31045794.

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 25550011133 its reverse (33111005552), we get a palindrome (58661016685).

The spelling of 25550011133 in words is "twenty-five billion, five hundred fifty million, eleven thousand, one hundred thirty-three".