1669559552872 has 8 divisors (see below), whose sum is σ = 3130424161650. Its totient is φ = 834779776432.

The previous prime is 1669559552861. The next prime is 1669559552891. The reversal of 1669559552872 is 2782559559661.

It can be written as a sum of positive squares in only one way, i.e., 1586929750756 + 82629802116 = 1259734^2 + 287454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104347472047 + ... + 104347472062.

Almost surely, 2^{1669559552872} is an apocalyptic number.

It is an amenable number.

1669559552872 is a deficient number, since it is larger than the sum of its proper divisors (1460864608778).

1669559552872 is a wasteful number, since it uses less digits than its factorization.

1669559552872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208694944115 (or 208694944111 counting only the distinct ones).

The product of its digits is 408240000, while the sum is 70.

The spelling of 1669559552872 in words is "one trillion, six hundred sixty-nine billion, five hundred fifty-nine million, five hundred fifty-two thousand, eight hundred seventy-two".