6745881645 has 24 divisors (see below), whose sum is σ = 11698596000. Its totient is φ = 3596039136.

The previous prime is 6745881641. The next prime is 6745881671. The reversal of 6745881645 is 5461885476.

6745881645 is a `hidden beast` number, since 6 + 7 + 4 + 588 + 16 + 45 = 666.

6745881645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6745881645 - 2² = 6745881641 is a prime.

It is a super-3 number, since 3×6745881645³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6745881591 and 6745881600.

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 23 ways as a sum of consecutive naturals, for example, 58746 + ... + 130164.

It is an arithmetic number, because the mean of its divisors is an integer number (487441500).

Almost surely, 2^6745881645 is an apocalyptic number.

It is an amenable number.

6745881645 is a deficient number, since it is larger than the sum of its proper divisors (4952714355).

6745881645 is a wasteful number, since it uses less digits than its factorization.

6745881645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73529 (or 73526 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 6745881645 is about 82133.3162912591. The cubic root of 6745881645 is about 1889.4971409320.

The spelling of 6745881645 in words is "six billion, seven hundred forty-five million, eight hundred eighty-one thousand, six hundred forty-five".