6738639634 has 8 divisors (see below), whose sum is σ = 10135059660. Its totient is φ = 3360286416.

The previous prime is 6738639631. The next prime is 6738639641. The reversal of 6738639634 is 4369368376.

It can be written as a sum of positive squares in 2 ways, for example, as 5874456025 + 864183609 = 76645^2 + 29397^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6738639631) 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 3 ways as a sum of consecutive naturals, for example, 4515769 + ... + 4517260.

Almost surely, 2^6738639634 is an apocalyptic number.

6738639634 is a deficient number, since it is larger than the sum of its proper divisors (3396420026).

6738639634 is a wasteful number, since it uses less digits than its factorization.

6738639634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9033404.

The product of its digits is 11757312, while the sum is 55.

The square root of 6738639634 is about 82089.2175258115. The cubic root of 6738639634 is about 1888.8207450985.

The spelling of 6738639634 in words is "six billion, seven hundred thirty-eight million, six hundred thirty-nine thousand, six hundred thirty-four".