54256802689 has 4 divisors (see below), whose sum is σ = 54261107460. Its totient is φ = 54252497920.

The previous prime is 54256802647. The next prime is 54256802741. The reversal of 54256802689 is 98620865245.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9558386289 + 44698416400 = 97767^2 + 211420^2 .

It is a cyclic number.

It is not a de Polignac number, because 54256802689 - 2²³ = 54248414081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54256802189) 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, 2133424 + ... + 2158705.

It is an arithmetic number, because the mean of its divisors is an integer number (13565276865).

Almost surely, 2^54256802689 is an apocalyptic number.

It is an amenable number.

54256802689 is a deficient number, since it is larger than the sum of its proper divisors (4304771).

54256802689 is a wasteful number, since it uses less digits than its factorization.

54256802689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304770.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 54256802689 in words is "fifty-four billion, two hundred fifty-six million, eight hundred two thousand, six hundred eighty-nine".