561734369280 has 1440 divisors, whose sum is σ = 2388289639680. Its totient is φ = 124853944320.

The previous prime is 561734369249. The next prime is 561734369291. The reversal of 561734369280 is 82963437165.

561734369280 is a `hidden beast` number, since 5 + 6 + 17 + 343 + 6 + 9 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7694991324 + ... + 7694991396.

It is an arithmetic number, because the mean of its divisors is an integer number (1658534472).

It is a 1-persistent number, because it is pandigital, but 2⋅561734369280 = 1123468738560 is not.

Almost surely, 2^561734369280 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 561734369280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194144819840).

561734369280 is an abundant number, since it is smaller than the sum of its proper divisors (1826555270400).

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

561734369280 is an equidigital number, since it uses as much as digits as its factorization.

561734369280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 561734369280 in words is "five hundred sixty-one billion, seven hundred thirty-four million, three hundred sixty-nine thousand, two hundred eighty".