9773216621 has 8 divisors (see below), whose sum is σ = 11279979264. Its totient is φ = 8294101200.

The previous prime is 9773216597. The next prime is 9773216623. The reversal of 9773216621 is 1266123779.

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

It is not a de Polignac number, because 9773216621 - 2¹⁰ = 9773215597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9773216623) 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, 6911045 + ... + 6912458.

It is an arithmetic number, because the mean of its divisors is an integer number (1409997408).

Almost surely, 2^9773216621 is an apocalyptic number.

It is an amenable number.

9773216621 is a deficient number, since it is larger than the sum of its proper divisors (1506762643).

9773216621 is a wasteful number, since it uses less digits than its factorization.

9773216621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13823611.

The product of its digits is 190512, while the sum is 44.

The square root of 9773216621 is about 98859.5803197647. The cubic root of 9773216621 is about 2138.0236667603.

The spelling of 9773216621 in words is "nine billion, seven hundred seventy-three million, two hundred sixteen thousand, six hundred twenty-one".