9921189553 has 8 divisors (see below), whose sum is σ = 11087094816. Its totient is φ = 8799280800.

The previous prime is 9921189539. The next prime is 9921189571. The reversal of 9921189553 is 3559811299.

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 9921189553 - 2⁹ = 9921189041 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 9921189553.

It is not an unprimeable number, because it can be changed into a prime (9921189503) 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, 10998651 + ... + 10999552.

It is an arithmetic number, because the mean of its divisors is an integer number (1385886852).

Almost surely, 2^9921189553 is an apocalyptic number.

It is an amenable number.

9921189553 is a deficient number, since it is larger than the sum of its proper divisors (1165905263).

9921189553 is a wasteful number, since it uses less digits than its factorization.

9921189553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998255.

The product of its digits is 874800, while the sum is 52.

The square root of 9921189553 is about 99605.1683046618. The cubic root of 9921189553 is about 2148.7600243574.

The spelling of 9921189553 in words is "nine billion, nine hundred twenty-one million, one hundred eighty-nine thousand, five hundred fifty-three".