1669479049949 has 4 divisors (see below), whose sum is σ = 1767683699964. Its totient is φ = 1571274399936.

The previous prime is 1669479049907. The next prime is 1669479049951. The reversal of 1669479049949 is 9499409749661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1176155433049 + 493323616900 = 1084507^2 + 702370^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669479049949 - 2¹² = 1669479045853 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 1669479049949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669479043949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49102324982 + ... + 49102325015.

It is an arithmetic number, because the mean of its divisors is an integer number (441920924991).

Almost surely, 2^{1669479049949} is an apocalyptic number.

It is an amenable number.

1669479049949 is a deficient number, since it is larger than the sum of its proper divisors (98204650015).

1669479049949 is an equidigital number, since it uses as much as digits as its factorization.

1669479049949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98204650014.

The product of its (nonzero) digits is 952342272, while the sum is 77.

The spelling of 1669479049949 in words is "one trillion, six hundred sixty-nine billion, four hundred seventy-nine million, forty-nine thousand, nine hundred forty-nine".