551863084500 has 2304 divisors, whose sum is σ = 2436060856320. Its totient is φ = 105815808000.

The previous prime is 551863084499. The next prime is 551863084541. The reversal of 551863084500 is 5480368155.

551863084500 is a `hidden beast` number, since 5 + 5 + 1 + 8 + 63 + 0 + 84 + 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 767 ways as a sum of consecutive naturals, for example, 7772719465 + ... + 7772719535.

It is an arithmetic number, because the mean of its divisors is an integer number (1057318080).

Almost surely, 2^551863084500 is an apocalyptic number.

551863084500 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 551863084500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1218030428160).

551863084500 is an abundant number, since it is smaller than the sum of its proper divisors (1884197771820).

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

551863084500 is a wasteful number, since it uses less digits than its factorization.

551863084500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 551863084500 in words is "five hundred fifty-one billion, eight hundred sixty-three million, eighty-four thousand, five hundred".