1641573318409 has 16 divisors (see below), whose sum is σ = 1739649756096. Its totient is φ = 1543665600000.

The previous prime is 1641573318377. The next prime is 1641573318419. The reversal of 1641573318409 is 9048133751461.

It is a cyclic number.

It is not a de Polignac number, because 1641573318409 - 2⁵ = 1641573318377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641573318419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145899034 + ... + 145910284.

It is an arithmetic number, because the mean of its divisors is an integer number (108728109756).

Almost surely, 2^{1641573318409} is an apocalyptic number.

It is an amenable number.

1641573318409 is a deficient number, since it is larger than the sum of its proper divisors (98076437687).

1641573318409 is a wasteful number, since it uses less digits than its factorization.

1641573318409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17976.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1641573318409 in words is "one trillion, six hundred forty-one billion, five hundred seventy-three million, three hundred eighteen thousand, four hundred nine".