561723611944860 has 48 divisors (see below), whose sum is σ = 1747584570496800. Its totient is φ = 149792963185152.

The previous prime is 561723611944843. The next prime is 561723611944907. The reversal of 561723611944860 is 68449116327165.

561723611944860 is a `hidden beast` number, since 5 + 6 + 1 + 7 + 2 + 3 + 61 + 1 + 94 + 486 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520114454965 + ... + 520114456044.

It is an arithmetic number, because the mean of its divisors is an integer number (36408011885350).

It is a 1-persistent number, because it is pandigital, but 2⋅561723611944860 = 1123447223889720 is not.

Almost surely, 2^{561723611944860} is an apocalyptic number.

It is an amenable number.

561723611944860 is an abundant number, since it is smaller than the sum of its proper divisors (1185860958551940).

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

561723611944860 is a wasteful number, since it uses less digits than its factorization.

561723611944860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040228911027 (or 1040228911019 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 561723611944860 in words is "five hundred sixty-one trillion, seven hundred twenty-three billion, six hundred eleven million, nine hundred forty-four thousand, eight hundred sixty".