12906691000 has 128 divisors (see below), whose sum is σ = 34905686400. Its totient is φ = 4375219200.

The previous prime is 12906690959. The next prime is 12906691027. The reversal of 12906691000 is 19660921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612642 + ... + 633358.

It is an arithmetic number, because the mean of its divisors is an integer number (272700675).

Almost surely, 2^12906691000 is an apocalyptic number.

12906691000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12906691000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17452843200).

12906691000 is an abundant number, since it is smaller than the sum of its proper divisors (21998995400).

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

12906691000 is a wasteful number, since it uses less digits than its factorization.

12906691000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20834 (or 20820 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 12906691000 in words is "twelve billion, nine hundred six million, six hundred ninety-one thousand".