9725648486399 has 4 divisors (see below), whose sum is σ = 9746654207136. Its totient is φ = 9704642765664.

The previous prime is 9725648486383. The next prime is 9725648486441. The reversal of 9725648486399 is 9936848465279.

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

It is a cyclic number.

It is not a de Polignac number, because 9725648486399 - 2⁴ = 9725648486383 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 (9725618486399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10502859674 + ... + 10502860599.

It is an arithmetic number, because the mean of its divisors is an integer number (2436663551784).

Almost surely, 2^{9725648486399} is an apocalyptic number.

9725648486399 is a deficient number, since it is larger than the sum of its proper divisors (21005720737).

9725648486399 is a wasteful number, since it uses less digits than its factorization.

9725648486399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21005720736.

The product of its digits is 5643509760, while the sum is 80.

The spelling of 9725648486399 in words is "nine trillion, seven hundred twenty-five billion, six hundred forty-eight million, four hundred eighty-six thousand, three hundred ninety-nine".