9145849561 has 4 divisors (see below), whose sum is σ = 9158897124. Its totient is φ = 9132802000.

The previous prime is 9145849511. The next prime is 9145849577. The reversal of 9145849561 is 1659485419.

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 7410627225 + 1735222336 = 86085^2 + 41656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9145849561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9145849499 and 9145849508.

It is not an unprimeable number, because it can be changed into a prime (9145849511) 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, 6522730 + ... + 6524131.

It is an arithmetic number, because the mean of its divisors is an integer number (2289724281).

Almost surely, 2^9145849561 is an apocalyptic number.

It is an amenable number.

9145849561 is a deficient number, since it is larger than the sum of its proper divisors (13047563).

9145849561 is a wasteful number, since it uses less digits than its factorization.

9145849561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13047562.

The product of its digits is 1555200, while the sum is 52.

The square root of 9145849561 is about 95633.9351956198. The cubic root of 9145849561 is about 2091.2599380148.

The spelling of 9145849561 in words is "nine billion, one hundred forty-five million, eight hundred forty-nine thousand, five hundred sixty-one".