551205534000 has 640 divisors, whose sum is σ = 2037341030400. Its totient is φ = 126905856000.

The previous prime is 551205533999. The next prime is 551205534029. The reversal of 551205534000 is 435502155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 226180782 + ... + 226183218.

It is an arithmetic number, because the mean of its divisors is an integer number (3183345360).

Almost surely, 2^551205534000 is an apocalyptic number.

551205534000 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 551205534000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018670515200).

551205534000 is an abundant number, since it is smaller than the sum of its proper divisors (1486135496400).

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

551205534000 is a wasteful number, since it uses less digits than its factorization.

551205534000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646 (or 2630 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 551205534000 in words is "five hundred fifty-one billion, two hundred five million, five hundred thirty-four thousand".