55557454800 has 120 divisors (see below), whose sum is σ = 178447613344. Its totient is φ = 14775482880.

The previous prime is 55557454751. The next prime is 55557454807. The reversal of 55557454800 is 845475555.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 55557454800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55557454807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385539 + ... + 509661.

Almost surely, 2^55557454800 is an apocalyptic number.

55557454800 is a gapful number since it is divisible by the number (50) 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 55557454800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89223806672).

55557454800 is an abundant number, since it is smaller than the sum of its proper divisors (122890158544).

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

55557454800 is a wasteful number, since it uses less digits than its factorization.

55557454800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124517 (or 124506 counting only the distinct ones).

The product of its (nonzero) digits is 2800000, while the sum is 48.

The spelling of 55557454800 in words is "fifty-five billion, five hundred fifty-seven million, four hundred fifty-four thousand, eight hundred".