12906864169531 has 2 divisors, whose sum is σ = 12906864169532. Its totient is φ = 12906864169530.

The previous prime is 12906864169523. The next prime is 12906864169541. The reversal of 12906864169531 is 13596146860921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12906864169531 - 2³ = 12906864169523 is a prime.

It is a super-2 number, since 2×12906864169531² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12906864169531.

It is not a weakly prime, because it can be changed into another prime (12906864169501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6453432084765 + 6453432084766.

It is an arithmetic number, because the mean of its divisors is an integer number (6453432084766).

Almost surely, 2^{12906864169531} is an apocalyptic number.

12906864169531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12906864169531 is an equidigital number, since it uses as much as digits as its factorization.

12906864169531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 12906864169531 in words is "twelve trillion, nine hundred six billion, eight hundred sixty-four million, one hundred sixty-nine thousand, five hundred thirty-one".