9641635667 has 8 divisors (see below), whose sum is σ = 9688580352. Its totient is φ = 9594748800.

The previous prime is 9641635651. The next prime is 9641635691. The reversal of 9641635667 is 7665361469.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9641635667 - 2⁴ = 9641635651 is a prime.

It is a super-2 number, since 2×9641635667² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9641635607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340913 + ... + 368109.

It is an arithmetic number, because the mean of its divisors is an integer number (1211072544).

Almost surely, 2^9641635667 is an apocalyptic number.

9641635667 is a deficient number, since it is larger than the sum of its proper divisors (46944685).

9641635667 is a wasteful number, since it uses less digits than its factorization.

9641635667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28909.

The product of its digits is 4898880, while the sum is 53.

The square root of 9641635667 is about 98191.8309585884. The cubic root of 9641635667 is about 2128.3852417320.

The spelling of 9641635667 in words is "nine billion, six hundred forty-one million, six hundred thirty-five thousand, six hundred sixty-seven".