9968624591 has 4 divisors (see below), whose sum is σ = 9980311992. Its totient is φ = 9956937192.

The previous prime is 9968624563. The next prime is 9968624641. The reversal of 9968624591 is 1954268699.

9968624591 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, and also an emirpimes, since its reverse is a distinct semiprime: 1954268699 = 5953 ⋅328283.

It is a cyclic number.

It is not a de Polignac number, because 9968624591 - 2¹⁸ = 9968362447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9968624591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968624521) 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, 5842421 + ... + 5844126.

It is an arithmetic number, because the mean of its divisors is an integer number (2495077998).

Almost surely, 2^9968624591 is an apocalyptic number.

9968624591 is a deficient number, since it is larger than the sum of its proper divisors (11687401).

9968624591 is a wasteful number, since it uses less digits than its factorization.

9968624591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11687400.

The product of its digits is 8398080, while the sum is 59.

The square root of 9968624591 is about 99842.9997095440. Note that the first 3 decimals coincide. The cubic root of 9968624591 is about 2152.1791204185.

The spelling of 9968624591 in words is "nine billion, nine hundred sixty-eight million, six hundred twenty-four thousand, five hundred ninety-one".