1649644712 has 8 divisors (see below), whose sum is σ = 3093083850. Its totient is φ = 824822352.

The previous prime is 1649644697. The next prime is 1649644753. The reversal of 1649644712 is 2174469461.

It can be written as a sum of positive squares in only one way, i.e., 1158313156 + 491331556 = 34034^2 + 22166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 103102787 + ... + 103102802.

Almost surely, 2^1649644712 is an apocalyptic number.

It is an amenable number.

1649644712 is a deficient number, since it is larger than the sum of its proper divisors (1443439138).

1649644712 is a wasteful number, since it uses less digits than its factorization.

1649644712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206205595 (or 206205591 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 1649644712 is about 40615.8184947688. The cubic root of 1649644712 is about 1181.5809299022.

The spelling of 1649644712 in words is "one billion, six hundred forty-nine million, six hundred forty-four thousand, seven hundred twelve".