10511530661 has 8 divisors (see below), whose sum is σ = 11240054424. Its totient is φ = 9795251200.

The previous prime is 10511530621. The next prime is 10511530681. The reversal of 10511530661 is 16603511501.

It can be written as a sum of positive squares in 4 ways, for example, as 2854230625 + 7657300036 = 53425^2 + 87506^2 .

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 10511530661 - 2²⁶ = 10444421797 is a prime.

It is a super-2 number, since 2×10511530661² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10511530621) 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, 3059300 + ... + 3062733.

It is an arithmetic number, because the mean of its divisors is an integer number (1405006803).

Almost surely, 2^10511530661 is an apocalyptic number.

It is an amenable number.

10511530661 is a deficient number, since it is larger than the sum of its proper divisors (728523763).

10511530661 is a wasteful number, since it uses less digits than its factorization.

10511530661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122151.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 10511530661 in words is "ten billion, five hundred eleven million, five hundred thirty thousand, six hundred sixty-one".