6738639631 has 2 divisors, whose sum is σ = 6738639632. Its totient is φ = 6738639630.

The previous prime is 6738639623. The next prime is 6738639641. The reversal of 6738639631 is 1369368376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6738639631 - 2³ = 6738639623 is a prime.

It is a super-2 number, since 2×6738639631² = 90818528152967632322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6738639641) 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 as a sum of consecutive naturals, namely, 3369319815 + 3369319816.

It is an arithmetic number, because the mean of its divisors is an integer number (3369319816).

Almost surely, 2^6738639631 is an apocalyptic number.

6738639631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6738639631 is an equidigital number, since it uses as much as digits as its factorization.

6738639631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 52.

The square root of 6738639631 is about 82089.2175075387. The cubic root of 6738639631 is about 1888.8207448182.

The spelling of 6738639631 in words is "six billion, seven hundred thirty-eight million, six hundred thirty-nine thousand, six hundred thirty-one".