561051601561 has 8 divisors (see below), whose sum is σ = 622430128800. Its totient is φ = 501402047040.

The previous prime is 561051601541. The next prime is 561051601603. The reversal of 561051601561 is 165106150165.

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

It is a cyclic number.

It is not a de Polignac number, because 561051601561 - 2¹¹ = 561051599513 is a prime.

It is a super-2 number, since 2×561051601561² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561051601561.

It is not an unprimeable number, because it can be changed into a prime (561051601501) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 432242496 + ... + 432243793.

It is an arithmetic number, because the mean of its divisors is an integer number (77803766100).

Almost surely, 2^561051601561 is an apocalyptic number.

It is an amenable number.

561051601561 is a deficient number, since it is larger than the sum of its proper divisors (61378527239).

561051601561 is a wasteful number, since it uses less digits than its factorization.

561051601561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864486359.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 561051601561 in words is "five hundred sixty-one billion, fifty-one million, six hundred one thousand, five hundred sixty-one".