18775264861247 has 2 divisors, whose sum is σ = 18775264861248. Its totient is φ = 18775264861246.

The previous prime is 18775264861207. The next prime is 18775264861267. The reversal of 18775264861247 is 74216846257781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18775264861247 - 2³⁰ = 18774191119423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18775264861207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9387632430623 + 9387632430624.

It is an arithmetic number, because the mean of its divisors is an integer number (9387632430624).

Almost surely, 2^{18775264861247} is an apocalyptic number.

18775264861247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18775264861247 is an equidigital number, since it uses as much as digits as its factorization.

18775264861247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252887040, while the sum is 68.

The spelling of 18775264861247 in words is "eighteen trillion, seven hundred seventy-five billion, two hundred sixty-four million, eight hundred sixty-one thousand, two hundred forty-seven".