9149127661 has 4 divisors (see below), whose sum is σ = 9169148092. Its totient is φ = 9129107232.

The previous prime is 9149127641. The next prime is 9149127667. The reversal of 9149127661 is 1667219419.

9149127661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4581936100 + 4567191561 = 67690^2 + 67581^2 .

It is a cyclic number.

It is not a de Polignac number, because 9149127661 - 2⁹ = 9149127149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9149127667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10009530 + ... + 10010443.

It is an arithmetic number, because the mean of its divisors is an integer number (2292287023).

Almost surely, 2^9149127661 is an apocalyptic number.

It is an amenable number.

9149127661 is a deficient number, since it is larger than the sum of its proper divisors (20020431).

9149127661 is a wasteful number, since it uses less digits than its factorization.

9149127661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20020430.

The product of its digits is 163296, while the sum is 46.

The square root of 9149127661 is about 95651.0724508617. The cubic root of 9149127661 is about 2091.5097613646.

The spelling of 9149127661 in words is "nine billion, one hundred forty-nine million, one hundred twenty-seven thousand, six hundred sixty-one".