1647849431168 has 16 divisors (see below), whose sum is σ = 3282825038910. Its totient is φ = 823924715520.

The previous prime is 1647849431147. The next prime is 1647849431171. The reversal of 1647849431168 is 8611349487461.

It can be written as a sum of positive squares in only one way, i.e., 1636577786944 + 11271644224 = 1279288^2 + 106168^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 1647849431168.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436911713 + ... + 6436911968.

Almost surely, 2^{1647849431168} is an apocalyptic number.

It is an amenable number.

1647849431168 is a deficient number, since it is larger than the sum of its proper divisors (1634975607742).

1647849431168 is an equidigital number, since it uses as much as digits as its factorization.

1647849431168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12873823695 (or 12873823683 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 62.

The spelling of 1647849431168 in words is "one trillion, six hundred forty-seven billion, eight hundred forty-nine million, four hundred thirty-one thousand, one hundred sixty-eight".