6745881646 has 24 divisors (see below), whose sum is σ = 12282656400. Its totient is φ = 2765391552.

The previous prime is 6745881641. The next prime is 6745881671. The reversal of 6745881646 is 6461885476.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745881641) 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 11 ways as a sum of consecutive naturals, for example, 1494171 + ... + 1498678.

It is an arithmetic number, because the mean of its divisors is an integer number (511777350).

Almost surely, 2^6745881646 is an apocalyptic number.

6745881646 is a deficient number, since it is larger than the sum of its proper divisors (5536774754).

6745881646 is a wasteful number, since it uses less digits than its factorization.

6745881646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992888 (or 2992881 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 55.

The square root of 6745881646 is about 82133.3162973467. The cubic root of 6745881646 is about 1889.4971410254.

The spelling of 6745881646 in words is "six billion, seven hundred forty-five million, eight hundred eighty-one thousand, six hundred forty-six".