581201551200 has 144 divisors (see below), whose sum is σ = 1957046147280. Its totient is φ = 149642680320.

The previous prime is 581201551187. The next prime is 581201551241. The reversal of 581201551200 is 2155102185.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4105699 + ... + 4244898.

It is an arithmetic number, because the mean of its divisors is an integer number (13590598245).

Almost surely, 2^581201551200 is an apocalyptic number.

581201551200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

581201551200 is an abundant number, since it is smaller than the sum of its proper divisors (1375844596080).

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

581201551200 is a wasteful number, since it uses less digits than its factorization.

581201551200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8350649 (or 8350636 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 30.

Adding to 581201551200 its reverse (2155102185), we get a palindrome (583356653385).

The spelling of 581201551200 in words is "five hundred eighty-one billion, two hundred one million, five hundred fifty-one thousand, two hundred".