6345646512 has 80 divisors (see below), whose sum is σ = 16684313088. Its totient is φ = 2077712640.

The previous prime is 6345646493. The next prime is 6345646519. The reversal of 6345646512 is 2156465436.

It is a super-2 number, since 2×6345646512² = 80534459310515532288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6345646519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4165783 + ... + 4167305.

Almost surely, 2^6345646512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6345646512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8342156544).

6345646512 is an abundant number, since it is smaller than the sum of its proper divisors (10338666576).

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

6345646512 is a wasteful number, since it uses less digits than its factorization.

6345646512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018 (or 3012 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 6345646512 is about 79659.5663558370. The cubic root of 6345646512 is about 1851.3646140158.

The spelling of 6345646512 in words is "six billion, three hundred forty-five million, six hundred forty-six thousand, five hundred twelve".