12809764531 has 2 divisors, whose sum is σ = 12809764532. Its totient is φ = 12809764530.

The previous prime is 12809764519. The next prime is 12809764553. The reversal of 12809764531 is 13546790821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12809764531 - 2¹³ = 12809756339 is a prime.

It is a super-2 number, since 2×12809764531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12809764501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404882265 + 6404882266.

It is an arithmetic number, because the mean of its divisors is an integer number (6404882266).

It is a 1-persistent number, because it is pandigital, but 2⋅12809764531 = 25619529062 is not.

Almost surely, 2^12809764531 is an apocalyptic number.

12809764531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12809764531 is an equidigital number, since it uses as much as digits as its factorization.

12809764531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 12809764531 in words is "twelve billion, eight hundred nine million, seven hundred sixty-four thousand, five hundred thirty-one".