9641056021 has 4 divisors (see below), whose sum is σ = 9650126752. Its totient is φ = 9631985292.

The previous prime is 9641056013. The next prime is 9641056049. The reversal of 9641056021 is 1206501469.

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.

It is a cyclic number.

It is not a de Polignac number, because 9641056021 - 2³ = 9641056013 is a prime.

It is a super-2 number, since 2×9641056021² (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 (9641056081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4533771 + ... + 4535896.

It is an arithmetic number, because the mean of its divisors is an integer number (2412531688).

Almost surely, 2^9641056021 is an apocalyptic number.

It is an amenable number.

9641056021 is a deficient number, since it is larger than the sum of its proper divisors (9070731).

9641056021 is a wasteful number, since it uses less digits than its factorization.

9641056021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9070730.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 9641056021 is about 98188.8793143093. The cubic root of 9641056021 is about 2128.3425887093.

The spelling of 9641056021 in words is "nine billion, six hundred forty-one million, fifty-six thousand, twenty-one".