12566155750079 has 2 divisors, whose sum is σ = 12566155750080. Its totient is φ = 12566155750078.

The previous prime is 12566155750009. The next prime is 12566155750097. The reversal of 12566155750079 is 97005755166521.

Together with next prime (12566155750097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12566155750079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12566155750009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283077875039 + 6283077875040.

It is an arithmetic number, because the mean of its divisors is an integer number (6283077875040).

Almost surely, 2^{12566155750079} is an apocalyptic number.

12566155750079 is a deficient number, since it is larger than the sum of its proper divisors (1).

12566155750079 is an equidigital number, since it uses as much as digits as its factorization.

12566155750079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845000, while the sum is 59.

The spelling of 12566155750079 in words is "twelve trillion, five hundred sixty-six billion, one hundred fifty-five million, seven hundred fifty thousand, seventy-nine".