10561060510991 has 16 divisors (see below), whose sum is σ = 10932069765600. Its totient is φ = 10190508518400.

The previous prime is 10561060510981. The next prime is 10561060510997. The reversal of 10561060510991 is 19901506016501.

It is a cyclic number.

It is not a de Polignac number, because 10561060510991 - 2²² = 10561056316687 is a prime.

It is a super-2 number, since 2×10561060510991² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10561060510997) 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, 665004371 + ... + 665020251.

It is an arithmetic number, because the mean of its divisors is an integer number (683254360350).

Almost surely, 2^{10561060510991} is an apocalyptic number.

10561060510991 is a deficient number, since it is larger than the sum of its proper divisors (371009254609).

10561060510991 is a wasteful number, since it uses less digits than its factorization.

10561060510991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28810.

The product of its (nonzero) digits is 72900, while the sum is 44.

The spelling of 10561060510991 in words is "ten trillion, five hundred sixty-one billion, sixty million, five hundred ten thousand, nine hundred ninety-one".