647883388771 has 2 divisors, whose sum is σ = 647883388772. Its totient is φ = 647883388770.

The previous prime is 647883388667. The next prime is 647883388811. The reversal of 647883388771 is 177883388746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647883388771 - 2⁷ = 647883388643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647883388771.

It is not a weakly prime, because it can be changed into another prime (647883088771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323941694385 + 323941694386.

It is an arithmetic number, because the mean of its divisors is an integer number (323941694386).

Almost surely, 2^647883388771 is an apocalyptic number.

647883388771 is a deficient number, since it is larger than the sum of its proper divisors (1).

647883388771 is an equidigital number, since it uses as much as digits as its factorization.

647883388771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 303464448, while the sum is 70.

The spelling of 647883388771 in words is "six hundred forty-seven billion, eight hundred eighty-three million, three hundred eighty-eight thousand, seven hundred seventy-one".