6425966405399 has 8 divisors (see below), whose sum is σ = 7099788970080. Its totient is φ = 5785013234176.

The previous prime is 6425966405393. The next prime is 6425966405407. The reversal of 6425966405399 is 9935046695246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6425966405399 - 2⁸ = 6425966405143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425966405393) 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 7 ways as a sum of consecutive naturals, for example, 8217347954 + ... + 8217348735.

It is an arithmetic number, because the mean of its divisors is an integer number (887473621260).

Almost surely, 2^{6425966405399} is an apocalyptic number.

6425966405399 is a deficient number, since it is larger than the sum of its proper divisors (673822564681).

6425966405399 is a wasteful number, since it uses less digits than its factorization.

6425966405399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16434696729.

The product of its (nonzero) digits is 377913600, while the sum is 68.

The spelling of 6425966405399 in words is "six trillion, four hundred twenty-five billion, nine hundred sixty-six million, four hundred five thousand, three hundred ninety-nine".