6444392864397 has 8 divisors (see below), whose sum is σ = 8869702007040. Its totient is φ = 4157672815680.

The previous prime is 6444392864387. The next prime is 6444392864423. The reversal of 6444392864397 is 7934682934446.

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

It is not a de Polignac number, because 6444392864397 - 2⁴ = 6444392864381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444392864387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34647273372 + ... + 34647273557.

It is an arithmetic number, because the mean of its divisors is an integer number (1108712750880).

Almost surely, 2^{6444392864397} is an apocalyptic number.

It is an amenable number.

6444392864397 is a deficient number, since it is larger than the sum of its proper divisors (2425309142643).

6444392864397 is a wasteful number, since it uses less digits than its factorization.

6444392864397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69294546963.

The product of its digits is 752467968, while the sum is 69.

The spelling of 6444392864397 in words is "six trillion, four hundred forty-four billion, three hundred ninety-two million, eight hundred sixty-four thousand, three hundred ninety-seven".