631772164447 has 2 divisors, whose sum is σ = 631772164448. Its totient is φ = 631772164446.

The previous prime is 631772164367. The next prime is 631772164459. The reversal of 631772164447 is 744461277136.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631772164447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631772164394 and 631772164403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631772164487) 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, 315886082223 + 315886082224.

It is an arithmetic number, because the mean of its divisors is an integer number (315886082224).

Almost surely, 2^631772164447 is an apocalyptic number.

631772164447 is a deficient number, since it is larger than the sum of its proper divisors (1).

631772164447 is an equidigital number, since it uses as much as digits as its factorization.

631772164447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 52.

The spelling of 631772164447 in words is "six hundred thirty-one billion, seven hundred seventy-two million, one hundred sixty-four thousand, four hundred forty-seven".