1669728636748 has 6 divisors (see below), whose sum is σ = 2922025114316. Its totient is φ = 834864318372.

The previous prime is 1669728636739. The next prime is 1669728636761. The reversal of 1669728636748 is 8476368279661.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208716079590 + ... + 208716079597.

Almost surely, 2^{1669728636748} is an apocalyptic number.

It is an amenable number.

1669728636748 is a deficient number, since it is larger than the sum of its proper divisors (1252296477568).

1669728636748 is a wasteful number, since it uses less digits than its factorization.

1669728636748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417432159191 (or 417432159189 counting only the distinct ones).

The product of its digits is 877879296, while the sum is 73.

The spelling of 1669728636748 in words is "one trillion, six hundred sixty-nine billion, seven hundred twenty-eight million, six hundred thirty-six thousand, seven hundred forty-eight".