55777555558 has 16 divisors (see below), whose sum is σ = 83906111520. Its totient is φ = 27808966656.

The previous prime is 55777555549. The next prime is 55777555579. The reversal of 55777555558 is 85555577755.

It is a happy number.

It is a super-3 number, since 3×55777555558³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 55777555558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967060 + ... + 1023112.

It is an arithmetic number, because the mean of its divisors is an integer number (5244131970).

Almost surely, 2^55777555558 is an apocalyptic number.

55777555558 is a deficient number, since it is larger than the sum of its proper divisors (28128555962).

55777555558 is a wasteful number, since it uses less digits than its factorization.

55777555558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57471.

The product of its digits is 214375000, while the sum is 64.

The spelling of 55777555558 in words is "fifty-five billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred fifty-eight".