10116616561 has 4 divisors (see below), whose sum is σ = 10230286500. Its totient is φ = 10002946624.

The previous prime is 10116616541. The next prime is 10116616571. The reversal of 10116616561 is 16561661101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16561661101 = 61 ⋅271502641.

It can be written as a sum of positive squares in 2 ways, for example, as 5984569600 + 4132046961 = 77360^2 + 64281^2 .

It is a cyclic number.

It is not a de Polignac number, because 10116616561 - 2¹¹ = 10116614513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10116616541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56834836 + ... + 56835013.

It is an arithmetic number, because the mean of its divisors is an integer number (2557571625).

Almost surely, 2^10116616561 is an apocalyptic number.

It is an amenable number.

10116616561 is a deficient number, since it is larger than the sum of its proper divisors (113669939).

10116616561 is an equidigital number, since it uses as much as digits as its factorization.

10116616561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113669938.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 10116616561 in words is "ten billion, one hundred sixteen million, six hundred sixteen thousand, five hundred sixty-one".