1669049843405 has 16 divisors (see below), whose sum is σ = 2320338572544. Its totient is φ = 1128813356160.

The previous prime is 1669049843311. The next prime is 1669049843411. The reversal of 1669049843405 is 5043489409661.

It is not a de Polignac number, because 1669049843405 - 2⁴⁰ = 569538215629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326621681 + ... + 326626790.

It is an arithmetic number, because the mean of its divisors is an integer number (145021160784).

Almost surely, 2^{1669049843405} is an apocalyptic number.

It is an amenable number.

1669049843405 is a deficient number, since it is larger than the sum of its proper divisors (651288729139).

1669049843405 is an equidigital number, since it uses as much as digits as its factorization.

1669049843405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653248556.

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 1669049843405 in words is "one trillion, six hundred sixty-nine billion, forty-nine million, eight hundred forty-three thousand, four hundred five".