991968750939 has 16 divisors (see below), whose sum is σ = 1354916513664. Its totient is φ = 645167515200.

The previous prime is 991968750937. The next prime is 991968750953. The reversal of 991968750939 is 939057869199.

It is not a de Polignac number, because 991968750939 - 2¹ = 991968750937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (991968750937) 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, 7496824 + ... + 7627994.

It is an arithmetic number, because the mean of its divisors is an integer number (84682282104).

Almost surely, 2^991968750939 is an apocalyptic number.

991968750939 is a deficient number, since it is larger than the sum of its proper divisors (362947762725).

991968750939 is a wasteful number, since it uses less digits than its factorization.

991968750939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192698.

The product of its (nonzero) digits is 297606960, while the sum is 75.

The spelling of 991968750939 in words is "nine hundred ninety-one billion, nine hundred sixty-eight million, seven hundred fifty thousand, nine hundred thirty-nine".