55557840000 has 320 divisors, whose sum is σ = 198606925440. Its totient is φ = 13675008000.

The previous prime is 55557839971. The next prime is 55557840007. The reversal of 55557840000 is 4875555.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55557840007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3111097 + ... + 3128903.

It is an arithmetic number, because the mean of its divisors is an integer number (620646642).

Almost surely, 2^55557840000 is an apocalyptic number.

55557840000 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 55557840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99303462720).

55557840000 is an abundant number, since it is smaller than the sum of its proper divisors (143049085440).

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

55557840000 is a wasteful number, since it uses less digits than its factorization.

55557840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17857 (or 17830 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 39.

The spelling of 55557840000 in words is "fifty-five billion, five hundred fifty-seven million, eight hundred forty thousand".