561551232060 has 288 divisors, whose sum is σ = 2174106235392. Its totient is φ = 118481045760.

The previous prime is 561551232043. The next prime is 561551232061. The reversal of 561551232060 is 60232155165.

561551232060 is a `hidden beast` number, since 5 + 6 + 1 + 551 + 23 + 20 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561551232061) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 192606 + ... + 1077125.

It is an arithmetic number, because the mean of its divisors is an integer number (7548979984).

Almost surely, 2^561551232060 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561551232060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1087053117696).

561551232060 is an abundant number, since it is smaller than the sum of its proper divisors (1612555003332).

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

561551232060 is a wasteful number, since it uses less digits than its factorization.

561551232060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269775 (or 1269761 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 561551232060 in words is "five hundred sixty-one billion, five hundred fifty-one million, two hundred thirty-two thousand, sixty".