11712991716 has 42 divisors (see below), whose sum is σ = 30732552102. Its totient is φ = 3904329600.

The previous prime is 11712991673. The next prime is 11712991723. The reversal of 11712991716 is 61719921711.

It can be written as a sum of positive squares in only one way, i.e., 11385743616 + 327248100 = 106704^2 + 18090^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2005485 + ... + 2011316.

It is an arithmetic number, because the mean of its divisors is an integer number (731727431).

Almost surely, 2^11712991716 is an apocalyptic number.

It is an amenable number.

11712991716 is an abundant number, since it is smaller than the sum of its proper divisors (19019560386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11712991716 is an equidigital number, since it uses as much as digits as its factorization.

11712991716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016823 (or 4016806 counting only the distinct ones).

The product of its digits is 47628, while the sum is 45.

The spelling of 11712991716 in words is "eleven billion, seven hundred twelve million, nine hundred ninety-one thousand, seven hundred sixteen".