9920128552 has 16 divisors (see below), whose sum is σ = 19032805440. Its totient is φ = 4844713776.

The previous prime is 9920128531. The next prime is 9920128567. The reversal of 9920128552 is 2558210299.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 9920128499 and 9920128508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14418448 + ... + 14419135.

It is an arithmetic number, because the mean of its divisors is an integer number (1189550340).

Almost surely, 2^9920128552 is an apocalyptic number.

It is an amenable number.

9920128552 is a deficient number, since it is larger than the sum of its proper divisors (9112676888).

9920128552 is a wasteful number, since it uses less digits than its factorization.

9920128552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28837632 (or 28837628 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 9920128552 is about 99599.8421283889. The cubic root of 9920128552 is about 2148.6834234015.

The spelling of 9920128552 in words is "nine billion, nine hundred twenty million, one hundred twenty-eight thousand, five hundred fifty-two".