5555617277778 has 12 divisors (see below), whose sum is σ = 12037170768558. Its totient is φ = 1851872425920.

The previous prime is 5555617277747. The next prime is 5555617277809. The reversal of 5555617277778 is 8777727165555.

5555617277778 is a `hidden beast` number, since 5 + 55 + 561 + 7 + 2 + 7 + 7 + 7 + 7 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (5555617277747) and next prime (5555617277809).

It can be written as a sum of positive squares in only one way, i.e., 4540466320569 + 1015150957209 = 2130837^2 + 1007547^2 .

It is a super-3 number, since 3×5555617277778³ (a number of 39 digits) contains 333 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 154322702143 + ... + 154322702178.

Almost surely, 2^{5555617277778} is an apocalyptic number.

5555617277778 is an abundant number, since it is smaller than the sum of its proper divisors (6481553490780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5555617277778 is a wasteful number, since it uses less digits than its factorization.

5555617277778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308645404329 (or 308645404326 counting only the distinct ones).

The product of its digits is 1008420000, while the sum is 72.

The spelling of 5555617277778 in words is "five trillion, five hundred fifty-five billion, six hundred seventeen million, two hundred seventy-seven thousand, seven hundred seventy-eight".