1128309643805 has 32 divisors (see below), whose sum is σ = 1497181536000. Its totient is φ = 812470044672.

The previous prime is 1128309643771. The next prime is 1128309643829. The reversal of 1128309643805 is 5083469038211.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128309643805 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1407284 + ... + 2058413.

It is an arithmetic number, because the mean of its divisors is an integer number (46786923000).

Almost surely, 2^{1128309643805} is an apocalyptic number.

It is an amenable number.

1128309643805 is a deficient number, since it is larger than the sum of its proper divisors (368871892195).

1128309643805 is a wasteful number, since it uses less digits than its factorization.

1128309643805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465893.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 1128309643805 in words is "one trillion, one hundred twenty-eight billion, three hundred nine million, six hundred forty-three thousand, eight hundred five".