1649484656641 has 4 divisors (see below), whose sum is σ = 1650155454000. Its totient is φ = 1648813859284.

The previous prime is 1649484656629. The next prime is 1649484656647. The reversal of 1649484656641 is 1466564849461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1649484656641 - 2⁹ = 1649484656129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649484656647) 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 3 ways as a sum of consecutive naturals, for example, 335394991 + ... + 335399908.

It is an arithmetic number, because the mean of its divisors is an integer number (412538863500).

Almost surely, 2^{1649484656641} is an apocalyptic number.

It is an amenable number.

1649484656641 is a deficient number, since it is larger than the sum of its proper divisors (670797359).

1649484656641 is an equidigital number, since it uses as much as digits as its factorization.

1649484656641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670797358.

The product of its digits is 119439360, while the sum is 64.

The spelling of 1649484656641 in words is "one trillion, six hundred forty-nine billion, four hundred eighty-four million, six hundred fifty-six thousand, six hundred forty-one".