561600721446 has 32 divisors (see below), whose sum is σ = 1128173080320. Its totient is φ = 186373464096.

The previous prime is 561600721379. The next prime is 561600721447. The reversal of 561600721446 is 644127006165.

It is a junction number, because it is equal to n+sod(n) for n = 561600721398 and 561600721407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561600721447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1001800 + ... + 1458356.

It is an arithmetic number, because the mean of its divisors is an integer number (35255408760).

Almost surely, 2^561600721446 is an apocalyptic number.

561600721446 is an abundant number, since it is smaller than the sum of its proper divisors (566572358874).

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

561600721446 is a wasteful number, since it uses less digits than its factorization.

561600721446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457468.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 561600721446 in words is "five hundred sixty-one billion, six hundred million, seven hundred twenty-one thousand, four hundred forty-six".