676938639631 has 2 divisors, whose sum is σ = 676938639632. Its totient is φ = 676938639630.

The previous prime is 676938639593. The next prime is 676938639649. The reversal of 676938639631 is 136936839676.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-676938639631 is a prime.

It is a super-2 number, since 2×676938639631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676938639661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338469319815 + 338469319816.

It is an arithmetic number, because the mean of its divisors is an integer number (338469319816).

Almost surely, 2^676938639631 is an apocalyptic number.

676938639631 is a deficient number, since it is larger than the sum of its proper divisors (1).

676938639631 is an equidigital number, since it uses as much as digits as its factorization.

676938639631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158723712, while the sum is 67.

The spelling of 676938639631 in words is "six hundred seventy-six billion, nine hundred thirty-eight million, six hundred thirty-nine thousand, six hundred thirty-one".