1647674649 has 16 divisors (see below), whose sum is σ = 2442457600. Its totient is φ = 1097793648.

The previous prime is 1647674647. The next prime is 1647674683. The reversal of 1647674649 is 9464767461.

It is not a de Polignac number, because 1647674649 - 2¹ = 1647674647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1647674595 and 1647674604.

It is not an unprimeable number, because it can be changed into a prime (1647674647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30147 + ... + 64839.

It is an arithmetic number, because the mean of its divisors is an integer number (152653600).

Almost surely, 2^1647674649 is an apocalyptic number.

It is an amenable number.

1647674649 is a deficient number, since it is larger than the sum of its proper divisors (794782951).

1647674649 is a wasteful number, since it uses less digits than its factorization.

1647674649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36461 (or 36455 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 1647674649 is about 40591.5588392464. The cubic root of 1647674649 is about 1181.1103808779.

It can be divided in two parts, 16476 and 74649, that added together give a cube (91125 = 45³).

The spelling of 1647674649 in words is "one billion, six hundred forty-seven million, six hundred seventy-four thousand, six hundred forty-nine".