555640000 has 140 divisors (see below), whose sum is σ = 1428292800. Its totient is φ = 214144000.

The previous prime is 555639983. The next prime is 555640021. The reversal of 555640000 is 46555.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1159761 + ... + 1160239.

Almost surely, 2^555640000 is an apocalyptic number.

555640000 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 555640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714146400).

555640000 is an abundant number, since it is smaller than the sum of its proper divisors (872652800).

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

555640000 is an equidigital number, since it uses as much as digits as its factorization.

555640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 555640000 is about 23572.0173086650. The cubic root of 555640000 is about 822.1123409150.

Adding to 555640000 its reverse (46555), we get a palindrome (555686555).

The spelling of 555640000 in words is "five hundred fifty-five million, six hundred forty thousand".