1669181255404 has 12 divisors (see below), whose sum is σ = 3145764673744. Its totient is φ = 770391348624.

The previous prime is 1669181255393. The next prime is 1669181255447. The reversal of 1669181255404 is 4045521819661.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 32099639527 = 1669181255404 / (1 + 6 + 6 + 9 + 1 + 8 + 1 + 2 + 5 + 5 + 4 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16049819712 + ... + 16049819815.

Almost surely, 2^{1669181255404} is an apocalyptic number.

It is an amenable number.

1669181255404 is a deficient number, since it is larger than the sum of its proper divisors (1476583418340).

1669181255404 is a wasteful number, since it uses less digits than its factorization.

1669181255404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32099639544 (or 32099639542 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 1669181255404 in words is "one trillion, six hundred sixty-nine billion, one hundred eighty-one million, two hundred fifty-five thousand, four hundred four".