2543378378 has 4 divisors (see below), whose sum is σ = 3815067570. Its totient is φ = 1271689188.

The previous prime is 2543378311. The next prime is 2543378407. The reversal of 2543378378 is 8738733452.

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

It can be written as a sum of positive squares in only one way, i.e., 2381147209 + 162231169 = 48797^2 + 12737^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 635844593 + ... + 635844596.

Almost surely, 2^2543378378 is an apocalyptic number.

2543378378 is a deficient number, since it is larger than the sum of its proper divisors (1271689192).

2543378378 is a wasteful number, since it uses less digits than its factorization.

2543378378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271689191.

The product of its digits is 3386880, while the sum is 50.

The square root of 2543378378 is about 50431.9182462853. The cubic root of 2543378378 is about 1365.0136416228.

The spelling of 2543378378 in words is "two billion, five hundred forty-three million, three hundred seventy-eight thousand, three hundred seventy-eight".