25545413413 has 16 divisors (see below), whose sum is σ = 27831610800. Its totient is φ = 23305328640.

The previous prime is 25545413407. The next prime is 25545413429. The reversal of 25545413413 is 31431454552.

It can be written as a sum of positive squares in 8 ways, for example, as 2022084 + 25543391329 = 1422^2 + 159823^2 .

It is a cyclic number.

It is not a de Polignac number, because 25545413413 - 2³³ = 16955478821 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 (25545413513) 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, 4487473 + ... + 4493161.

It is an arithmetic number, because the mean of its divisors is an integer number (1739475675).

Almost surely, 2^25545413413 is an apocalyptic number.

It is an amenable number.

25545413413 is a deficient number, since it is larger than the sum of its proper divisors (2286197387).

25545413413 is a wasteful number, since it uses less digits than its factorization.

25545413413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9672.

The product of its digits is 144000, while the sum is 37.

Adding to 25545413413 its reverse (31431454552), we get a palindrome (56976867965).

The spelling of 25545413413 in words is "twenty-five billion, five hundred forty-five million, four hundred thirteen thousand, four hundred thirteen".