1938945751445 has 8 divisors (see below), whose sum is σ = 2334956581536. Its totient is φ = 1545675481296.

The previous prime is 1938945751397. The next prime is 1938945751447. The reversal of 1938945751445 is 5441575498391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1938945751445 - 2¹⁸ = 1938945489301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938945751447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685138427 + ... + 685141256.

It is an arithmetic number, because the mean of its divisors is an integer number (291869572692).

Almost surely, 2^{1938945751445} is an apocalyptic number.

It is an amenable number.

1938945751445 is a deficient number, since it is larger than the sum of its proper divisors (396010830091).

1938945751445 is a wasteful number, since it uses less digits than its factorization.

1938945751445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370279971.

The product of its digits is 108864000, while the sum is 65.

The spelling of 1938945751445 in words is "one trillion, nine hundred thirty-eight billion, nine hundred forty-five million, seven hundred fifty-one thousand, four hundred forty-five".