9435864641 has 4 divisors (see below), whose sum is σ = 10783845312. Its totient is φ = 8087883972.

The previous prime is 9435864617. The next prime is 9435864643. The reversal of 9435864641 is 1464685349.

9435864641 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1464685349 = 1621 ⋅903569.

It is a de Polignac number, because none of the positive numbers 2^k-9435864641 is a prime.

It is a super-3 number, since 3×9435864641³ (a number of 31 digits) contains 333 as substring.

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 9435864641.

It is not an unprimeable number, because it can be changed into a prime (9435864643) 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, 673990325 + ... + 673990338.

It is an arithmetic number, because the mean of its divisors is an integer number (2695961328).

Almost surely, 2^9435864641 is an apocalyptic number.

It is an amenable number.

9435864641 is a deficient number, since it is larger than the sum of its proper divisors (1347980671).

9435864641 is a wasteful number, since it uses less digits than its factorization.

9435864641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347980670.

The product of its digits is 2488320, while the sum is 50.

The square root of 9435864641 is about 97138.3788262909. The cubic root of 9435864641 is about 2113.1349549884.

The spelling of 9435864641 in words is "nine billion, four hundred thirty-five million, eight hundred sixty-four thousand, six hundred forty-one".