9278467561 has 4 divisors (see below), whose sum is σ = 10121964624. Its totient is φ = 8434970500.

The previous prime is 9278467531. The next prime is 9278467573. The reversal of 9278467561 is 1657648729.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9278467561 - 2⁵ = 9278467529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9278467501) 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, 421748515 + ... + 421748536.

It is an arithmetic number, because the mean of its divisors is an integer number (2530491156).

Almost surely, 2^9278467561 is an apocalyptic number.

It is an amenable number.

9278467561 is a deficient number, since it is larger than the sum of its proper divisors (843497063).

9278467561 is a wasteful number, since it uses less digits than its factorization.

9278467561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843497062.

The product of its digits is 5080320, while the sum is 55.

The square root of 9278467561 is about 96324.8024186917. The cubic root of 9278467561 is about 2101.3194701733.

The spelling of 9278467561 in words is "nine billion, two hundred seventy-eight million, four hundred sixty-seven thousand, five hundred sixty-one".