647577346631 has 2 divisors, whose sum is σ = 647577346632. Its totient is φ = 647577346630.

The previous prime is 647577346601. The next prime is 647577346643. The reversal of 647577346631 is 136643775746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647577346631 - 2³⁴ = 630397477447 is a prime.

It is a super-2 number, since 2×647577346631² (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 (647577346601) 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, 323788673315 + 323788673316.

It is an arithmetic number, because the mean of its divisors is an integer number (323788673316).

Almost surely, 2^647577346631 is an apocalyptic number.

647577346631 is a deficient number, since it is larger than the sum of its proper divisors (1).

647577346631 is an equidigital number, since it uses as much as digits as its factorization.

647577346631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53343360, while the sum is 59.

The spelling of 647577346631 in words is "six hundred forty-seven billion, five hundred seventy-seven million, three hundred forty-six thousand, six hundred thirty-one".