1683815604409 has 4 divisors (see below), whose sum is σ = 1683818266000. Its totient is φ = 1683812942820.

The previous prime is 1683815604407. The next prime is 1683815604509. The reversal of 1683815604409 is 9044065183861.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1683815604409 - 2¹ = 1683815604407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1683815604409.

It is not an unprimeable number, because it can be changed into a prime (1683815604407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222454 + ... + 1848544.

It is an arithmetic number, because the mean of its divisors is an integer number (420954566500).

Almost surely, 2^{1683815604409} is an apocalyptic number.

It is an amenable number.

1683815604409 is a deficient number, since it is larger than the sum of its proper divisors (2661591).

1683815604409 is a wasteful number, since it uses less digits than its factorization.

1683815604409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661590.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 1683815604409 in words is "one trillion, six hundred eighty-three billion, eight hundred fifteen million, six hundred four thousand, four hundred nine".