6749643615 has 32 divisors (see below), whose sum is σ = 12687446016. Its totient is φ = 3020818560.

The previous prime is 6749643611. The next prime is 6749643617. The reversal of 6749643615 is 5163469476.

It is not a de Polignac number, because 6749643615 - 2² = 6749643611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6749643611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1571199 + ... + 1575488.

It is an arithmetic number, because the mean of its divisors is an integer number (396482688).

Almost surely, 2^6749643615 is an apocalyptic number.

6749643615 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6749643615 is a deficient number, since it is larger than the sum of its proper divisors (5937802401).

6749643615 is a wasteful number, since it uses less digits than its factorization.

6749643615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146719.

The product of its digits is 3265920, while the sum is 51.

The square root of 6749643615 is about 82156.2147071054. The cubic root of 6749643615 is about 1889.8483137411.

It can be divided in two parts, 67496 and 43615, that added together give a palindrome (111111).

The spelling of 6749643615 in words is "six billion, seven hundred forty-nine million, six hundred forty-three thousand, six hundred fifteen".