278131448423 has 4 divisors (see below), whose sum is σ = 278133185880. Its totient is φ = 278129710968.

The previous prime is 278131448407. The next prime is 278131448443. The reversal of 278131448423 is 324844131872.

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 278131448423 - 2⁴ = 278131448407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278131448443) 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, 601133 + ... + 957926.

It is an arithmetic number, because the mean of its divisors is an integer number (69533296470).

Almost surely, 2^278131448423 is an apocalyptic number.

278131448423 is a deficient number, since it is larger than the sum of its proper divisors (1737457).

278131448423 is a wasteful number, since it uses less digits than its factorization.

278131448423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737456.

The product of its digits is 1032192, while the sum is 47.

The spelling of 278131448423 in words is "two hundred seventy-eight billion, one hundred thirty-one million, four hundred forty-eight thousand, four hundred twenty-three".