1378447728743 has 2 divisors, whose sum is σ = 1378447728744. Its totient is φ = 1378447728742.

The previous prime is 1378447728739. The next prime is 1378447728761. The reversal of 1378447728743 is 3478277448731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378447728743 - 2² = 1378447728739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378447728743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378447788743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689223864371 + 689223864372.

It is an arithmetic number, because the mean of its divisors is an integer number (689223864372).

Almost surely, 2^{1378447728743} is an apocalyptic number.

1378447728743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378447728743 is an equidigital number, since it uses as much as digits as its factorization.

1378447728743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 177020928, while the sum is 65.

The spelling of 1378447728743 in words is "one trillion, three hundred seventy-eight billion, four hundred forty-seven million, seven hundred twenty-eight thousand, seven hundred forty-three".