9891628001 has 2 divisors, whose sum is σ = 9891628002. Its totient is φ = 9891628000.

The previous prime is 9891627997. The next prime is 9891628049. The reversal of 9891628001 is 1008261989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5340101776 + 4551526225 = 73076^2 + 67465^2 .

It is a cyclic number.

It is not a de Polignac number, because 9891628001 - 2² = 9891627997 is a prime.

It is not a weakly prime, because it can be changed into another prime (9891628051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4945814000 + 4945814001.

It is an arithmetic number, because the mean of its divisors is an integer number (4945814001).

Almost surely, 2^9891628001 is an apocalyptic number.

It is an amenable number.

9891628001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9891628001 is an equidigital number, since it uses as much as digits as its factorization.

9891628001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 9891628001 is about 99456.6639346002. The cubic root of 9891628001 is about 2146.6237255785.

The spelling of 9891628001 in words is "nine billion, eight hundred ninety-one million, six hundred twenty-eight thousand, one".