11691692512 has 48 divisors (see below), whose sum is σ = 23616058032. Its totient is φ = 5694407680.

The previous prime is 11691692473. The next prime is 11691692513. The reversal of 11691692512 is 21529619611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691692513) 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, 881643 + ... + 894805.

It is an arithmetic number, because the mean of its divisors is an integer number (492001209).

Almost surely, 2^11691692512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11691692512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11808029016).

11691692512 is an abundant number, since it is smaller than the sum of its proper divisors (11924365520).

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

11691692512 is a wasteful number, since it uses less digits than its factorization.

11691692512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13891 (or 13883 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The spelling of 11691692512 in words is "eleven billion, six hundred ninety-one million, six hundred ninety-two thousand, five hundred twelve".