647684885485 has 16 divisors (see below), whose sum is σ = 870794030592. Its totient is φ = 458312644800.

The previous prime is 647684885467. The next prime is 647684885503. The reversal of 647684885485 is 584588486746.

It is an interprime number because it is at equal distance from previous prime (647684885467) and next prime (647684885503).

It is not a de Polignac number, because 647684885485 - 2¹¹ = 647684883437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159134301 + ... + 159138370.

It is an arithmetic number, because the mean of its divisors is an integer number (54424626912).

Almost surely, 2^647684885485 is an apocalyptic number.

It is an amenable number.

647684885485 is a deficient number, since it is larger than the sum of its proper divisors (223109145107).

647684885485 is a wasteful number, since it uses less digits than its factorization.

647684885485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318272724.

The product of its digits is 1651507200, while the sum is 73.

The spelling of 647684885485 in words is "six hundred forty-seven billion, six hundred eighty-four million, eight hundred eighty-five thousand, four hundred eighty-five".