23825556986449 has 9 divisors (see below), whose sum is σ = 23850648039387. Its totient is φ = 23800492317144.

The previous prime is 23825556986419. The next prime is 23825556986467. The reversal of 23825556986449 is 94468965552832.

The square root of 23825556986449 is 4881143.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6058219209025 + 17767337777424 = 2461345^2 + 4215132^2 .

It is not a de Polignac number, because 23825556986449 - 2¹⁷ = 23825556855377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23825556986419) 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 8 ways as a sum of consecutive naturals, for example, 6145357099 + ... + 6145360975.

Almost surely, 2^{23825556986449} is an apocalyptic number.

23825556986449 is the 4881143-rd square number.

23825556986449 is the 2440572-nd centered octagonal number.

It is an amenable number.

23825556986449 is a deficient number, since it is larger than the sum of its proper divisors (25091052938).

23825556986449 is an frugal number, since it uses more digits than its factorization.

23825556986449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10272 (or 5136 counting only the distinct ones).

The product of its digits is 4478976000, while the sum is 76.

The spelling of 23825556986449 in words is "twenty-three trillion, eight hundred twenty-five billion, five hundred fifty-six million, nine hundred eighty-six thousand, four hundred forty-nine".