55557888888 has 64 divisors (see below), whose sum is σ = 143843558400. Its totient is φ = 17860868480.

The previous prime is 55557888863. The next prime is 55557888899. The reversal of 55557888888 is 88888875555.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590245 + ... + 677867.

It is an arithmetic number, because the mean of its divisors is an integer number (2247555600).

Almost surely, 2^55557888888 is an apocalyptic number.

55557888888 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55557888888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71921779200).

55557888888 is an abundant number, since it is smaller than the sum of its proper divisors (88285669512).

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

55557888888 is a wasteful number, since it uses less digits than its factorization.

55557888888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88572 (or 88568 counting only the distinct ones).

The product of its digits is 1146880000, while the sum is 75.

The spelling of 55557888888 in words is "fifty-five billion, five hundred fifty-seven million, eight hundred eighty-eight thousand, eight hundred eighty-eight".