12945969811 has 2 divisors, whose sum is σ = 12945969812. Its totient is φ = 12945969810.

The previous prime is 12945969767. The next prime is 12945969821. The reversal of 12945969811 is 11896954921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12945969811 - 2⁷ = 12945969683 is a prime.

It is not a weakly prime, because it can be changed into another prime (12945969821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472984905 + 6472984906.

It is an arithmetic number, because the mean of its divisors is an integer number (6472984906).

Almost surely, 2^12945969811 is an apocalyptic number.

12945969811 is a deficient number, since it is larger than the sum of its proper divisors (1).

12945969811 is an equidigital number, since it uses as much as digits as its factorization.

12945969811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 55.

The spelling of 12945969811 in words is "twelve billion, nine hundred forty-five million, nine hundred sixty-nine thousand, eight hundred eleven".