6745639118 has 4 divisors (see below), whose sum is σ = 10118458680. Its totient is φ = 3372819558.

The previous prime is 6745639093. The next prime is 6745639193. The reversal of 6745639118 is 8119365476.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×6745639118² = 91007294220583635848, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1686409778 + ... + 1686409781.

It is an arithmetic number, because the mean of its divisors is an integer number (2529614670).

Almost surely, 2^6745639118 is an apocalyptic number.

6745639118 is a deficient number, since it is larger than the sum of its proper divisors (3372819562).

6745639118 is a wasteful number, since it uses less digits than its factorization.

6745639118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372819561.

The product of its digits is 1088640, while the sum is 50.

The square root of 6745639118 is about 82131.8398551987. The cubic root of 6745639118 is about 1889.4744970144.

The spelling of 6745639118 in words is "six billion, seven hundred forty-five million, six hundred thirty-nine thousand, one hundred eighteen".