6399073907946 has 96 divisors (see below), whose sum is σ = 14708697389568. Its totient is φ = 2007063826560.

The previous prime is 6399073907929. The next prime is 6399073907953. The reversal of 6399073907946 is 6497093709936.

6399073907946 is a `hidden beast` number, since 63 + 9 + 90 + 7 + 390 + 7 + 94 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30513520 + ... + 30722516.

It is an arithmetic number, because the mean of its divisors is an integer number (153215597808).

Almost surely, 2^{6399073907946} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6399073907946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7354348694784).

6399073907946 is an abundant number, since it is smaller than the sum of its proper divisors (8309623481622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6399073907946 is a wasteful number, since it uses less digits than its factorization.

6399073907946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210556 (or 210553 counting only the distinct ones).

The product of its (nonzero) digits is 416649744, while the sum is 72.

The spelling of 6399073907946 in words is "six trillion, three hundred ninety-nine billion, seventy-three million, nine hundred seven thousand, nine hundred forty-six".