25505135033 has 4 divisors (see below), whose sum is σ = 29148725760. Its totient is φ = 21861544308.

The previous prime is 25505134979. The next prime is 25505135041. The reversal of 25505135033 is 33053150552.

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 25505135033 - 2⁸ = 25505134777 is a prime.

It is a super-2 number, since 2×25505135033² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25505135063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1821795353 + ... + 1821795366.

It is an arithmetic number, because the mean of its divisors is an integer number (7287181440).

Almost surely, 2^25505135033 is an apocalyptic number.

It is an amenable number.

25505135033 is a deficient number, since it is larger than the sum of its proper divisors (3643590727).

25505135033 is an equidigital number, since it uses as much as digits as its factorization.

25505135033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643590726.

The product of its (nonzero) digits is 33750, while the sum is 32.

Adding to 25505135033 its reverse (33053150552), we get a palindrome (58558285585).

The spelling of 25505135033 in words is "twenty-five billion, five hundred five million, one hundred thirty-five thousand, thirty-three".