1171091928428 has 24 divisors (see below), whose sum is σ = 2068362618000. Its totient is φ = 580150980288.

The previous prime is 1171091928421. The next prime is 1171091928493. The reversal of 1171091928428 is 8248291901711.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1171091928428.

It is not an unprimeable number, because it can be changed into a prime (1171091928421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2238098 + ... + 2711321.

It is an arithmetic number, because the mean of its divisors is an integer number (86181775750).

Almost surely, 2^{1171091928428} is an apocalyptic number.

It is an amenable number.

1171091928428 is a deficient number, since it is larger than the sum of its proper divisors (897270689572).

1171091928428 is a wasteful number, since it uses less digits than its factorization.

1171091928428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949969 (or 4949967 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 53.

The spelling of 1171091928428 in words is "one trillion, one hundred seventy-one billion, ninety-one million, nine hundred twenty-eight thousand, four hundred twenty-eight".