1646304164641 has 4 divisors (see below), whose sum is σ = 1647316031152. Its totient is φ = 1645292298132.

The previous prime is 1646304164639. The next prime is 1646304164767. The reversal of 1646304164641 is 1464614036461.

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 1646304164641 - 2¹ = 1646304164639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1646304164591 and 1646304164600.

It is not an unprimeable number, because it can be changed into a prime (1646304164621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505930815 + ... + 505934068.

It is an arithmetic number, because the mean of its divisors is an integer number (411829007788).

Almost surely, 2^{1646304164641} is an apocalyptic number.

It is an amenable number.

1646304164641 is a deficient number, since it is larger than the sum of its proper divisors (1011866511).

1646304164641 is a wasteful number, since it uses less digits than its factorization.

1646304164641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011866510.

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 1646304164641 in words is "one trillion, six hundred forty-six billion, three hundred four million, one hundred sixty-four thousand, six hundred forty-one".