561445036521 has 8 divisors (see below), whose sum is σ = 751257416544. Its totient is φ = 372964673760.

The previous prime is 561445036511. The next prime is 561445036589. The reversal of 561445036521 is 125630544165.

561445036521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561445036521 - 2⁷ = 561445036393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561445036511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333003331 + ... + 333005016.

It is an arithmetic number, because the mean of its divisors is an integer number (93907177068).

Almost surely, 2^561445036521 is an apocalyptic number.

It is an amenable number.

561445036521 is a deficient number, since it is larger than the sum of its proper divisors (189812380023).

561445036521 is a wasteful number, since it uses less digits than its factorization.

561445036521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666008631.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 561445036521 in words is "five hundred sixty-one billion, four hundred forty-five million, thirty-six thousand, five hundred twenty-one".