6446741391 has 12 divisors (see below), whose sum is σ = 9327158568. Its totient is φ = 4290812784.

The previous prime is 6446741387. The next prime is 6446741419. The reversal of 6446741391 is 1931476446.

6446741391 is a `hidden beast` number, since 6 + 446 + 74 + 139 + 1 = 666.

It is not a de Polignac number, because 6446741391 - 2² = 6446741387 is a prime.

It is a super-2 number, since 2×6446741391² = 83120949124865229762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446741321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 578745 + ... + 589778.

It is an arithmetic number, because the mean of its divisors is an integer number (777263214).

Almost surely, 2^6446741391 is an apocalyptic number.

6446741391 is a deficient number, since it is larger than the sum of its proper divisors (2880417177).

6446741391 is a wasteful number, since it uses less digits than its factorization.

6446741391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169142 (or 1169139 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 6446741391 is about 80291.6022445685. The cubic root of 6446741391 is about 1861.1444560961.

The spelling of 6446741391 in words is "six billion, four hundred forty-six million, seven hundred forty-one thousand, three hundred ninety-one".