9955957128 has 64 divisors (see below), whose sum is σ = 26952744000. Its totient is φ = 3046429440.

The previous prime is 9955957127. The next prime is 9955957139. The reversal of 9955957128 is 8217595599.

It is not an unprimeable number, because it can be changed into a prime (9955957127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31678 + ... + 144621.

It is an arithmetic number, because the mean of its divisors is an integer number (421136625).

Almost surely, 2^9955957128 is an apocalyptic number.

It is an amenable number.

9955957128 is an abundant number, since it is smaller than the sum of its proper divisors (16996786872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9955957128 is a wasteful number, since it uses less digits than its factorization.

9955957128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176502 (or 176498 counting only the distinct ones).

The product of its digits is 10206000, while the sum is 60.

The square root of 9955957128 is about 99779.5426327461. The cubic root of 9955957128 is about 2151.2671187964.

The spelling of 9955957128 in words is "nine billion, nine hundred fifty-five million, nine hundred fifty-seven thousand, one hundred twenty-eight".