165500655006503 has 2 divisors, whose sum is σ = 165500655006504. Its totient is φ = 165500655006502.

The previous prime is 165500655006451. The next prime is 165500655006551. The reversal of 165500655006503 is 305600556005561.

165500655006503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165500655006503 - 2¹⁰ = 165500655005479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165500655006593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82750327503251 + 82750327503252.

It is an arithmetic number, because the mean of its divisors is an integer number (82750327503252).

Almost surely, 2^{165500655006503} is an apocalyptic number.

165500655006503 is a deficient number, since it is larger than the sum of its proper divisors (1).

165500655006503 is an equidigital number, since it uses as much as digits as its factorization.

165500655006503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025000, while the sum is 47.

The spelling of 165500655006503 in words is "one hundred sixty-five trillion, five hundred billion, six hundred fifty-five million, six thousand, five hundred three".