991122933745 has 32 divisors (see below), whose sum is σ = 1367776972800. Its totient is φ = 675374293440.

The previous prime is 991122933743. The next prime is 991122933751. The reversal of 991122933745 is 547339221199.

It is not a de Polignac number, because 991122933745 - 2¹ = 991122933743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (991122933743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5560884 + ... + 5736346.

It is an arithmetic number, because the mean of its divisors is an integer number (42743030400).

Almost surely, 2^991122933745 is an apocalyptic number.

It is an amenable number.

991122933745 is a deficient number, since it is larger than the sum of its proper divisors (376654039055).

991122933745 is a wasteful number, since it uses less digits than its factorization.

991122933745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176485.

The product of its digits is 3674160, while the sum is 55.

The spelling of 991122933745 in words is "nine hundred ninety-one billion, one hundred twenty-two million, nine hundred thirty-three thousand, seven hundred forty-five".