9651294081 has 81 divisors (see below), whose sum is σ = 16665473097. Its totient is φ = 5375747520.

The previous prime is 9651294073. The next prime is 9651294083. The reversal of 9651294081 is 1804921569.

The square root of 9651294081 is 98241.

It is a perfect power (a square), and thus also a powerful number.

9651294081 is a `hidden beast` number, since 96 + 512 + 9 + 40 + 8 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 161417025 + 9489877056 = 12705^2 + 97416^2 .

It is not a de Polignac number, because 9651294081 - 2³ = 9651294073 is a prime.

It is a super-2 number, since 2×9651294081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9651294083) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 42145275 + ... + 42145503.

Almost surely, 2^9651294081 is an apocalyptic number.

9651294081 is the 98241-st square number.

9651294081 is the 49121-st centered octagonal number.

It is an amenable number.

9651294081 is a deficient number, since it is larger than the sum of its proper divisors (7014179016).

9651294081 is a wasteful number, since it uses less digits than its factorization.

9651294081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The cubic root of 9651294081 is about 2129.0957009025.

The spelling of 9651294081 in words is "nine billion, six hundred fifty-one million, two hundred ninety-four thousand, eighty-one".