9102868561 has 4 divisors (see below), whose sum is σ = 9274620852. Its totient is φ = 8931116272.

The previous prime is 9102868559. The next prime is 9102868573. The reversal of 9102868561 is 1658682019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1658682019 = 41 ⋅40455659.

It can be written as a sum of positive squares in 2 ways, for example, as 6202507536 + 2900361025 = 78756^2 + 53855^2 .

It is a cyclic number.

It is not a de Polignac number, because 9102868561 - 2¹ = 9102868559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9102868361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85876066 + ... + 85876171.

It is an arithmetic number, because the mean of its divisors is an integer number (2318655213).

Almost surely, 2^9102868561 is an apocalyptic number.

It is an amenable number.

9102868561 is a deficient number, since it is larger than the sum of its proper divisors (171752291).

9102868561 is a wasteful number, since it uses less digits than its factorization.

9102868561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171752290.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 9102868561 is about 95408.9543019941. The cubic root of 9102868561 is about 2087.9788279765.

The spelling of 9102868561 in words is "nine billion, one hundred two million, eight hundred sixty-eight thousand, five hundred sixty-one".