2378019978889 has 15 divisors (see below), whose sum is σ = 2424493188733. Its totient is φ = 2332437547492.

The previous prime is 2378019978881. The next prime is 2378019978911. The reversal of 2378019978889 is 9888799108732.

The square root of 2378019978889 is 1542083.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2378019978889 - 2³ = 2378019978881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2378019978881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5367990702 + ... + 5367991144.

Almost surely, 2^{2378019978889} is an apocalyptic number.

2378019978889 is the 1542083-rd square number.

2378019978889 is the 771042-nd centered octagonal number.

It is an amenable number.

2378019978889 is a deficient number, since it is larger than the sum of its proper divisors (46473209844).

2378019978889 is an frugal number, since it uses more digits than its factorization.

2378019978889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 877879296, while the sum is 79.

The spelling of 2378019978889 in words is "two trillion, three hundred seventy-eight billion, nineteen million, nine hundred seventy-eight thousand, eight hundred eighty-nine".