25605506020133 has 16 divisors (see below), whose sum is σ = 27595201803120. Its totient is φ = 23618676957696.

The previous prime is 25605506020123. The next prime is 25605506020169. The reversal of 25605506020133 is 33102060550652.

It can be written as a sum of positive squares in 8 ways, for example, as 2521690008289 + 23083816011844 = 1587983^2 + 4804562^2 .

It is a cyclic number.

It is not a de Polignac number, because 25605506020133 - 2²⁴ = 25605489242917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25605506020123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179948891 + ... + 180091127.

It is an arithmetic number, because the mean of its divisors is an integer number (1724700112695).

Almost surely, 2^{25605506020133} is an apocalyptic number.

It is an amenable number.

25605506020133 is a deficient number, since it is larger than the sum of its proper divisors (1989695782987).

25605506020133 is a wasteful number, since it uses less digits than its factorization.

25605506020133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152216.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 25605506020133 its reverse (33102060550652), we get a palindrome (58707566570785).

The spelling of 25605506020133 in words is "twenty-five trillion, six hundred five billion, five hundred six million, twenty thousand, one hundred thirty-three".