1378785543273 has 24 divisors (see below), whose sum is σ = 2039680184256. Its totient is φ = 897219928800.

The previous prime is 1378785543271. The next prime is 1378785543383. The reversal of 1378785543273 is 3723455878731.

1378785543273 is a `hidden beast` number, since 1 + 3 + 7 + 8 + 7 + 8 + 554 + 3 + 2 + 73 = 666.

It is not a de Polignac number, because 1378785543273 - 2¹ = 1378785543271 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378785543273.

It is not an unprimeable number, because it can be changed into a prime (1378785543271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9513765 + ... + 9657602.

It is an arithmetic number, because the mean of its divisors is an integer number (84986674344).

Almost surely, 2^{1378785543273} is an apocalyptic number.

It is an amenable number.

1378785543273 is a deficient number, since it is larger than the sum of its proper divisors (660894640983).

1378785543273 is a wasteful number, since it uses less digits than its factorization.

1378785543273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19171565 (or 19171562 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 63.

The spelling of 1378785543273 in words is "one trillion, three hundred seventy-eight billion, seven hundred eighty-five million, five hundred forty-three thousand, two hundred seventy-three".