1938304209945 has 64 divisors (see below), whose sum is σ = 3297985113600. Its totient is φ = 970575943680.

The previous prime is 1938304209857. The next prime is 1938304210009. The reversal of 1938304209945 is 5499024038391.

It is not a de Polignac number, because 1938304209945 - 2¹¹ = 1938304207897 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1824751 + ... + 2684459.

It is an arithmetic number, because the mean of its divisors is an integer number (51531017400).

Almost surely, 2^{1938304209945} is an apocalyptic number.

1938304209945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1938304209945 is a deficient number, since it is larger than the sum of its proper divisors (1359680903655).

1938304209945 is a wasteful number, since it uses less digits than its factorization.

1938304209945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859890.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 1938304209945 in words is "one trillion, nine hundred thirty-eight billion, three hundred four million, two hundred nine thousand, nine hundred forty-five".