647882785882 has 16 divisors (see below), whose sum is σ = 976926436200. Its totient is φ = 322241210368.

The previous prime is 647882785813. The next prime is 647882785951. The reversal of 647882785882 is 288587288746.

It is an interprime number because it is at equal distance from previous prime (647882785813) and next prime (647882785951).

It can be written as a sum of positive squares in 4 ways, for example, as 646945140241 + 937645641 = 804329^2 + 30621^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2183994 + ... + 2462842.

Almost surely, 2^647882785882 is an apocalyptic number.

647882785882 is a deficient number, since it is larger than the sum of its proper divisors (329043650318).

647882785882 is a wasteful number, since it uses less digits than its factorization.

647882785882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284945.

The product of its digits is 770703360, while the sum is 73.

The spelling of 647882785882 in words is "six hundred forty-seven billion, eight hundred eighty-two million, seven hundred eighty-five thousand, eight hundred eighty-two".