10561000505561 has 8 divisors (see below), whose sum is σ = 11528529240000. Its totient is φ = 9594711401040.

The previous prime is 10561000505557. The next prime is 10561000505563. The reversal of 10561000505561 is 16550500016501.

10561000505561 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 a cyclic number.

It is not a de Polignac number, because 10561000505561 - 2² = 10561000505557 is a prime.

It is a super-2 number, since 2×10561000505561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10561000505563) 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, 309889661 + ... + 309923738.

It is an arithmetic number, because the mean of its divisors is an integer number (1441066155000).

Almost surely, 2^{10561000505561} is an apocalyptic number.

10561000505561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10561000505561 is a deficient number, since it is larger than the sum of its proper divisors (967528734439).

10561000505561 is a wasteful number, since it uses less digits than its factorization.

10561000505561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619814959.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 10561000505561 in words is "ten trillion, five hundred sixty-one billion, five hundred five thousand, five hundred sixty-one".