12812864691 has 32 divisors (see below), whose sum is σ = 19793085696. Its totient is φ = 7286400000.

The previous prime is 12812864663. The next prime is 12812864699. The reversal of 12812864691 is 19646821821.

It is not a de Polignac number, because 12812864691 - 2⁷ = 12812864563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12812864691.

It is not an unprimeable number, because it can be changed into a prime (12812864699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151191 + ... + 220191.

It is an arithmetic number, because the mean of its divisors is an integer number (618533928).

Almost surely, 2^12812864691 is an apocalyptic number.

12812864691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12812864691 is a deficient number, since it is larger than the sum of its proper divisors (6980221005).

12812864691 is a wasteful number, since it uses less digits than its factorization.

12812864691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69363.

The product of its digits is 331776, while the sum is 48.

The spelling of 12812864691 in words is "twelve billion, eight hundred twelve million, eight hundred sixty-four thousand, six hundred ninety-one".