555400396800 has 576 divisors, whose sum is σ = 2019460500720. Its totient is φ = 145883136000.

The previous prime is 555400396799. The next prime is 555400396807. The reversal of 555400396800 is 8693004555.

555400396800 is a `hidden beast` number, since 5 + 554 + 0 + 0 + 3 + 96 + 8 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555400396807) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 523468270 + ... + 523469330.

Almost surely, 2^555400396800 is an apocalyptic number.

555400396800 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 555400396800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009730250360).

555400396800 is an abundant number, since it is smaller than the sum of its proper divisors (1464060103920).

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

555400396800 is a wasteful number, since it uses less digits than its factorization.

555400396800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 555400396800 in words is "five hundred fifty-five billion, four hundred million, three hundred ninety-six thousand, eight hundred".