55556777839 has 16 divisors (see below), whose sum is σ = 56546205408. Its totient is φ = 54576617472.

The previous prime is 55556777791. The next prime is 55556777849. The reversal of 55556777839 is 93877765555.

It is a cyclic number.

It is not a de Polignac number, because 55556777839 - 2¹⁷ = 55556646767 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 (55556777849) 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, 29040747 + ... + 29042659.

It is an arithmetic number, because the mean of its divisors is an integer number (3534137838).

Almost surely, 2^55556777839 is an apocalyptic number.

55556777839 is a deficient number, since it is larger than the sum of its proper divisors (989427569).

55556777839 is a wasteful number, since it uses less digits than its factorization.

55556777839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074.

The product of its digits is 277830000, while the sum is 67.

The spelling of 55556777839 in words is "fifty-five billion, five hundred fifty-six million, seven hundred seventy-seven thousand, eight hundred thirty-nine".