1649768495684 has 6 divisors (see below), whose sum is σ = 2887094867454. Its totient is φ = 824884247840.

The previous prime is 1649768495671. The next prime is 1649768495737. The reversal of 1649768495684 is 4865948679461.

It can be written as a sum of positive squares in only one way, i.e., 1649113135684 + 655360000 = 1284178^2 + 25600^2 .

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 as a sum of consecutive naturals, namely, 206221061957 + ... + 206221061964.

It is an arithmetic number, because the mean of its divisors is an integer number (481182477909).

Almost surely, 2^{1649768495684} is an apocalyptic number.

It is an amenable number.

1649768495684 is a deficient number, since it is larger than the sum of its proper divisors (1237326371770).

1649768495684 is a wasteful number, since it uses less digits than its factorization.

1649768495684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412442123925 (or 412442123923 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 77.

The spelling of 1649768495684 in words is "one trillion, six hundred forty-nine billion, seven hundred sixty-eight million, four hundred ninety-five thousand, six hundred eighty-four".