10561066590 has 128 divisors (see below), whose sum is σ = 28275609600. Its totient is φ = 2513064960.

The previous prime is 10561066513. The next prime is 10561066591. The reversal of 10561066590 is 9566016501.

It is a super-2 number, since 2×10561066590² (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 (10561066591) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 669939 + ... + 685521.

It is an arithmetic number, because the mean of its divisors is an integer number (220903200).

Almost surely, 2^10561066590 is an apocalyptic number.

10561066590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10561066590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14137804800).

10561066590 is an abundant number, since it is smaller than the sum of its proper divisors (17714543010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10561066590 is a wasteful number, since it uses less digits than its factorization.

10561066590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15682.

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 10561066590 in words is "ten billion, five hundred sixty-one million, sixty-six thousand, five hundred ninety".