6744736781 has 8 divisors (see below), whose sum is σ = 6815259264. Its totient is φ = 6674554800.

The previous prime is 6744736777. The next prime is 6744736783. The reversal of 6744736781 is 1876374476.

6744736781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6744736781 - 2² = 6744736777 is a prime.

It is a super-2 number, since 2×6744736781² = 90982948489948483922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6744736783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45206 + ... + 124631.

It is an arithmetic number, because the mean of its divisors is an integer number (851907408).

Almost surely, 2^6744736781 is an apocalyptic number.

It is an amenable number.

6744736781 is a deficient number, since it is larger than the sum of its proper divisors (70522483).

6744736781 is a wasteful number, since it uses less digits than its factorization.

6744736781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170251.

The product of its digits is 4741632, while the sum is 53.

The square root of 6744736781 is about 82126.3464486276. The cubic root of 6744736781 is about 1889.3902441242.

The spelling of 6744736781 in words is "six billion, seven hundred forty-four million, seven hundred thirty-six thousand, seven hundred eighty-one".