1378233870859 has 4 divisors (see below), whose sum is σ = 1387012430704. Its totient is φ = 1369455311016.

The previous prime is 1378233870803. The next prime is 1378233870883. The reversal of 1378233870859 is 9580783328731.

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 1378233870859 - 2¹¹ = 1378233868811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378233870859.

It is not an unprimeable number, because it can be changed into a prime (1378233840859) 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, 4389279687 + ... + 4389280000.

It is an arithmetic number, because the mean of its divisors is an integer number (346753107676).

Almost surely, 2^{1378233870859} is an apocalyptic number.

1378233870859 is a deficient number, since it is larger than the sum of its proper divisors (8778559845).

1378233870859 is an equidigital number, since it uses as much as digits as its factorization.

1378233870859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778559844.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 1378233870859 in words is "one trillion, three hundred seventy-eight billion, two hundred thirty-three million, eight hundred seventy thousand, eight hundred fifty-nine".