12720867869623 has 2 divisors, whose sum is σ = 12720867869624. Its totient is φ = 12720867869622.

The previous prime is 12720867869569. The next prime is 12720867869657. The reversal of 12720867869623 is 32696876802721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12720867869623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12720867869663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360433934811 + 6360433934812.

It is an arithmetic number, because the mean of its divisors is an integer number (6360433934812).

Almost surely, 2^{12720867869623} is an apocalyptic number.

12720867869623 is a deficient number, since it is larger than the sum of its proper divisors (1).

12720867869623 is an equidigital number, since it uses as much as digits as its factorization.

12720867869623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 12720867869623 in words is "twelve trillion, seven hundred twenty billion, eight hundred sixty-seven million, eight hundred sixty-nine thousand, six hundred twenty-three".