25504405133 has 4 divisors (see below), whose sum is σ = 25506478140. Its totient is φ = 25502332128.

The previous prime is 25504405103. The next prime is 25504405141. The reversal of 25504405133 is 33150440552.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6477513289 + 19026891844 = 80483^2 + 137938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25504405133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25504405133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25504405103) 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, 1017938 + ... + 1042691.

It is an arithmetic number, because the mean of its divisors is an integer number (6376619535).

Almost surely, 2^25504405133 is an apocalyptic number.

It is an amenable number.

25504405133 is a deficient number, since it is larger than the sum of its proper divisors (2073007).

25504405133 is a wasteful number, since it uses less digits than its factorization.

25504405133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073006.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 25504405133 its reverse (33150440552), we get a palindrome (58654845685).

The spelling of 25504405133 in words is "twenty-five billion, five hundred four million, four hundred five thousand, one hundred thirty-three".