1378612715443 has 4 divisors (see below), whose sum is σ = 1397497821208. Its totient is φ = 1359727609680.

The previous prime is 1378612715407. The next prime is 1378612715461. The reversal of 1378612715443 is 3445172168731.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1378612715443 - 2²¹ = 1378610618291 is a prime.

It is a super-2 number, since 2×1378612715443² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378612718443) 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, 9442552773 + ... + 9442552918.

It is an arithmetic number, because the mean of its divisors is an integer number (349374455302).

Almost surely, 2^{1378612715443} is an apocalyptic number.

1378612715443 is a deficient number, since it is larger than the sum of its proper divisors (18885105765).

1378612715443 is an equidigital number, since it uses as much as digits as its factorization.

1378612715443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18885105764.

The product of its digits is 3386880, while the sum is 52.

The spelling of 1378612715443 in words is "one trillion, three hundred seventy-eight billion, six hundred twelve million, seven hundred fifteen thousand, four hundred forty-three".