555997500 has 120 divisors (see below), whose sum is σ = 1801485840. Its totient is φ = 148248000.

The previous prime is 555997499. The next prime is 555997511. The reversal of 555997500 is 5799555.

555997500 is a `hidden beast` number, since 5 + 5 + 59 + 97 + 500 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63382 + ... + 71618.

It is an arithmetic number, because the mean of its divisors is an integer number (15012382).

Almost surely, 2^555997500 is an apocalyptic number.

555997500 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 555997500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900742920).

555997500 is an abundant number, since it is smaller than the sum of its proper divisors (1245488340).

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

555997500 is a wasteful number, since it uses less digits than its factorization.

555997500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270 (or 8247 counting only the distinct ones).

The product of its (nonzero) digits is 354375, while the sum is 45.

The square root of 555997500 is about 23579.5992332355. The cubic root of 555997500 is about 822.2886194115.

The spelling of 555997500 in words is "five hundred fifty-five million, nine hundred ninety-seven thousand, five hundred".