11691401208 has 32 divisors (see below), whose sum is σ = 29288549760. Its totient is φ = 3889127520.

The previous prime is 11691401203. The next prime is 11691401219. The reversal of 11691401208 is 80210419611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691401203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488458 + ... + 511833.

It is an arithmetic number, because the mean of its divisors is an integer number (915267180).

Almost surely, 2^11691401208 is an apocalyptic number.

It is an amenable number.

11691401208 is an abundant number, since it is smaller than the sum of its proper divisors (17597148552).

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

11691401208 is a wasteful number, since it uses less digits than its factorization.

11691401208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000787 (or 1000783 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The spelling of 11691401208 in words is "eleven billion, six hundred ninety-one million, four hundred one thousand, two hundred eight".