10505055581 has 16 divisors (see below), whose sum is σ = 11039293440. Its totient is φ = 9977476080.

The previous prime is 10505055569. The next prime is 10505055601. The reversal of 10505055581 is 18555050501.

It is a cyclic number.

It is not a de Polignac number, because 10505055581 - 2¹⁴ = 10505039197 is a prime.

It is a super-2 number, since 2×10505055581² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505055481) 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, 2822840 + ... + 2826558.

It is an arithmetic number, because the mean of its divisors is an integer number (689955840).

Almost surely, 2^10505055581 is an apocalyptic number.

It is an amenable number.

10505055581 is a deficient number, since it is larger than the sum of its proper divisors (534237859).

10505055581 is a wasteful number, since it uses less digits than its factorization.

10505055581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576.

The product of its (nonzero) digits is 25000, while the sum is 35.

The spelling of 10505055581 in words is "ten billion, five hundred five million, fifty-five thousand, five hundred eighty-one".