2378138543 has 4 divisors (see below), whose sum is σ = 2594332968. Its totient is φ = 2161944120.

The previous prime is 2378138531. The next prime is 2378138569. The reversal of 2378138543 is 3458318732.

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 2378138543 - 2⁴ = 2378138527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2378138494 and 2378138503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378138513) 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, 108097196 + ... + 108097217.

It is an arithmetic number, because the mean of its divisors is an integer number (648583242).

Almost surely, 2^2378138543 is an apocalyptic number.

2378138543 is a deficient number, since it is larger than the sum of its proper divisors (216194425).

2378138543 is a wasteful number, since it uses less digits than its factorization.

2378138543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216194424.

The product of its digits is 483840, while the sum is 44.

The square root of 2378138543 is about 48766.1618645552. The cubic root of 2378138543 is about 1334.7882774771.

The spelling of 2378138543 in words is "two billion, three hundred seventy-eight million, one hundred thirty-eight thousand, five hundred forty-three".