2456438399 has 4 divisors (see below), whose sum is σ = 2522828664. Its totient is φ = 2390048136.

The previous prime is 2456438363. The next prime is 2456438401. The reversal of 2456438399 is 9938346542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9938346542 = 2 ⋅4969173271.

It is a cyclic number.

It is not a de Polignac number, because 2456438399 - 2²⁴ = 2439661183 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 2456438399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456438899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33195077 + ... + 33195150.

It is an arithmetic number, because the mean of its divisors is an integer number (630707166).

Almost surely, 2^2456438399 is an apocalyptic number.

2456438399 is a deficient number, since it is larger than the sum of its proper divisors (66390265).

2456438399 is an equidigital number, since it uses as much as digits as its factorization.

2456438399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66390264.

The product of its digits is 5598720, while the sum is 53.

The square root of 2456438399 is about 49562.4696620336. The cubic root of 2456438399 is about 1349.2796154752.

The spelling of 2456438399 in words is "two billion, four hundred fifty-six million, four hundred thirty-eight thousand, three hundred ninety-nine".