6445846539971 has 8 divisors (see below), whose sum is σ = 6451816644000. Its totient is φ = 6439877544448.

The previous prime is 6445846539941. The next prime is 6445846539973. The reversal of 6445846539971 is 1799356485446.

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

It is a cyclic number.

It is not a de Polignac number, because 6445846539971 - 2¹⁰ = 6445846538947 is a prime.

It is a super-2 number, since 2×6445846539971² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6445846539895 and 6445846539904.

It is not an unprimeable number, because it can be changed into a prime (6445846539973) 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, 11592890 + ... + 12136176.

It is an arithmetic number, because the mean of its divisors is an integer number (806477080500).

Almost surely, 2^{6445846539971} is an apocalyptic number.

6445846539971 is a deficient number, since it is larger than the sum of its proper divisors (5970104029).

6445846539971 is a wasteful number, since it uses less digits than its factorization.

6445846539971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554253.

The product of its digits is 783820800, while the sum is 71.

The spelling of 6445846539971 in words is "six trillion, four hundred forty-five billion, eight hundred forty-six million, five hundred thirty-nine thousand, nine hundred seventy-one".