2678426872449 has 16 divisors (see below), whose sum is σ = 3584660071680. Its totient is φ = 1778906344320.

The previous prime is 2678426872447. The next prime is 2678426872469. The reversal of 2678426872449 is 9442786248762.

It is not a de Polignac number, because 2678426872449 - 2¹ = 2678426872447 is a prime.

It is a super-2 number, since 2×2678426872449² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2678426872447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25223064 + ... + 25329030.

It is an arithmetic number, because the mean of its divisors is an integer number (224041254480).

Almost surely, 2^{2678426872449} is an apocalyptic number.

It is an amenable number.

2678426872449 is a deficient number, since it is larger than the sum of its proper divisors (906233199231).

2678426872449 is a wasteful number, since it uses less digits than its factorization.

2678426872449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137560.

The product of its digits is 520224768, while the sum is 69.

The spelling of 2678426872449 in words is "two trillion, six hundred seventy-eight billion, four hundred twenty-six million, eight hundred seventy-two thousand, four hundred forty-nine".