9481650581 has 4 divisors (see below), whose sum is σ = 10211008332. Its totient is φ = 8752292832.

The previous prime is 9481650569. The next prime is 9481650583. The reversal of 9481650581 is 1850561849.

It is a happy number.

9481650581 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 1850561849 = 4211 ⋅439459.

It can be written as a sum of positive squares in 2 ways, for example, as 2394536356 + 7087114225 = 48934^2 + 84185^2 .

It is a cyclic number.

It is not a de Polignac number, because 9481650581 - 2³⁰ = 8407908757 is a prime.

It is a super-2 number, since 2×9481650581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9481650583) 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, 364678856 + ... + 364678881.

It is an arithmetic number, because the mean of its divisors is an integer number (2552752083).

Almost surely, 2^9481650581 is an apocalyptic number.

It is an amenable number.

9481650581 is a deficient number, since it is larger than the sum of its proper divisors (729357751).

9481650581 is a wasteful number, since it uses less digits than its factorization.

9481650581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729357750.

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 9481650581 is about 97373.7674171026. The cubic root of 9481650581 is about 2116.5473184806.

The spelling of 9481650581 in words is "nine billion, four hundred eighty-one million, six hundred fifty thousand, five hundred eighty-one".